diff --git a/SVSim.Database/Repositories/Mission/IMissionCatalogRepository.cs b/SVSim.Database/Repositories/Mission/IMissionCatalogRepository.cs
index cbba699..66c7155 100644
--- a/SVSim.Database/Repositories/Mission/IMissionCatalogRepository.cs
+++ b/SVSim.Database/Repositories/Mission/IMissionCatalogRepository.cs
@@ -14,6 +14,11 @@ public interface IMissionCatalogRepository
     /// <summary>All distinct achievement_type values present in the catalog. Used by /load/index materialization.</summary>
     Task<List<int>> GetAllAchievementTypesAsync(CancellationToken ct);
 
+    /// <summary>MIN(Level) per achievement_type — the "starting tier" for new viewers when the
+    /// catalog doesn't contain a level-1 row. With our captured-data-is-catalog model, a fresh
+    /// viewer starts at whatever the lowest captured tier is for that type.</summary>
+    Task<IReadOnlyDictionary<int, int>> GetMinLevelByAchievementTypeAsync(CancellationToken ct);
+
     /// <summary>MAX(Level) per achievement_type — cached. Used to compute wire max_level.</summary>
     Task<IReadOnlyDictionary<int, int>> GetMaxLevelByAchievementTypeAsync(CancellationToken ct);
 
diff --git a/SVSim.Database/Repositories/Mission/MissionCatalogRepository.cs b/SVSim.Database/Repositories/Mission/MissionCatalogRepository.cs
index 68d91b2..90f5538 100644
--- a/SVSim.Database/Repositories/Mission/MissionCatalogRepository.cs
+++ b/SVSim.Database/Repositories/Mission/MissionCatalogRepository.cs
@@ -57,6 +57,15 @@ public sealed class MissionCatalogRepository : IMissionCatalogRepository
         finally { _maxLevelLock.Release(); }
     }
 
+    public async Task<IReadOnlyDictionary<int, int>> GetMinLevelByAchievementTypeAsync(CancellationToken ct)
+    {
+        var pairs = await _db.AchievementCatalog.AsNoTracking()
+            .GroupBy(e => e.AchievementType)
+            .Select(g => new { Type = g.Key, Min = g.Min(e => e.Level) })
+            .ToListAsync(ct);
+        return pairs.ToDictionary(p => p.Type, p => p.Min);
+    }
+
     public Task<AchievementCatalogEntry?> GetAchievementAsync(int achievementType, int level, CancellationToken ct) =>
         _db.AchievementCatalog.AsNoTracking()
             .FirstOrDefaultAsync(e => e.AchievementType == achievementType && e.Level == level, ct);
diff --git a/SVSim.EmulatedEntrypoint/Controllers/MissionController.cs b/SVSim.EmulatedEntrypoint/Controllers/MissionController.cs
new file mode 100644
index 0000000..e45fed2
--- /dev/null
+++ b/SVSim.EmulatedEntrypoint/Controllers/MissionController.cs
@@ -0,0 +1,124 @@
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.EntityFrameworkCore;
+using SVSim.Database;
+using SVSim.Database.Models;
+using SVSim.Database.Repositories.Mission;
+using SVSim.EmulatedEntrypoint.Models.Dtos.Common.Mission;
+using SVSim.EmulatedEntrypoint.Models.Dtos.Mission;
+using SVSim.EmulatedEntrypoint.Models.Dtos.Requests;
+using SVSim.EmulatedEntrypoint.Services;
+
+namespace SVSim.EmulatedEntrypoint.Controllers;
+
+/// <summary>
+/// /mission/* — daily/weekly mission slots + achievement claim flow. Wire shapes mirror
+/// MissionInfoDetail.cs + Wizard/Mission*Task.cs.
+/// </summary>
+[Route("mission")]
+public class MissionController : SVSimController
+{
+    private const int RetireCooldownSeconds = 75600; // 21h per capture
+    private const int FailureResultCode = 2;
+
+    private readonly SVSimDbContext _db;
+    private readonly IViewerMissionStateService _state;
+    private readonly IMissionAssembler _assembler;
+    private readonly IMissionCatalogRepository _catalog;
+    private readonly IViewerMissionRepository _viewerRepo;
+    private readonly TimeProvider _time;
+
+    public MissionController(
+        SVSimDbContext db,
+        IViewerMissionStateService state,
+        IMissionAssembler assembler,
+        IMissionCatalogRepository catalog,
+        IViewerMissionRepository viewerRepo,
+        TimeProvider time)
+    {
+        _db = db;
+        _state = state;
+        _assembler = assembler;
+        _catalog = catalog;
+        _viewerRepo = viewerRepo;
+        _time = time;
+    }
+
+    [HttpPost("info")]
+    public async Task<IActionResult> Info(BaseRequest request, CancellationToken ct)
+    {
+        if (!TryGetViewerId(out long viewerId)) return Unauthorized();
+        var viewer = await LoadViewer(viewerId, ct);
+
+        await _state.EnsureCurrentAsync(viewer, ct);
+        await _db.SaveChangesAsync(ct);
+
+        var dto = await _assembler.BuildAsync(viewer, ct);
+        return Ok(dto);
+    }
+
+    [HttpPost("retire")]
+    public async Task<IActionResult> Retire(MissionRetireRequest request, CancellationToken ct)
+    {
+        if (!TryGetViewerId(out long viewerId)) return Unauthorized();
+        var viewer = await LoadViewer(viewerId, ct);
+
+        var missions = await _viewerRepo.GetMissionsAsync(viewerId, ct);
+        var target = missions.FirstOrDefault(m => m.Id == request.Id);
+        if (target is null)
+        {
+            return Ok(new { result_code = FailureResultCode });
+        }
+
+        var catalogRow = await _catalog.GetByIdAsync(target.MissionCatalogId, ct);
+        if (catalogRow is null || catalogRow.LotType != 2)
+        {
+            return Ok(new { result_code = FailureResultCode });
+        }
+
+        var pool = await _catalog.GetByLotTypeAsync(2, ct);
+        var assignedIds = missions
+            .Where(m => m.Slot != target.Slot)
+            .Select(m => m.MissionCatalogId).ToHashSet();
+        var candidates = pool.Where(p => p.Id != target.MissionCatalogId && !assignedIds.Contains(p.Id)).ToList();
+        if (candidates.Count == 0)
+        {
+            return Ok(new { result_code = FailureResultCode });
+        }
+        var pick = candidates[Random.Shared.Next(candidates.Count)];
+
+        var now = _time.GetUtcNow();
+        _viewerRepo.RemoveMission(target);
+        _viewerRepo.AddMission(new ViewerMission
+        {
+            ViewerId = viewerId,
+            MissionCatalogId = pick.Id,
+            Slot = target.Slot,
+            AssignedAt = now.ToUnixTimeSeconds(),
+            MissionStatus = 1,
+        });
+        viewer.MissionData.MissionChangeTime = now.AddSeconds(RetireCooldownSeconds).UtcDateTime;
+        await _db.SaveChangesAsync(ct);
+
+        var dto = await _assembler.BuildAsync(viewer, ct);
+        return Ok(dto);
+    }
+
+    [HttpPost("change_receive_setting")]
+    public async Task<IActionResult> ChangeReceiveSetting(MissionChangeReceiveSettingRequest request, CancellationToken ct)
+    {
+        if (!TryGetViewerId(out long viewerId)) return Unauthorized();
+        var viewer = await LoadViewer(viewerId, ct);
+
+        viewer.MissionData.MissionReceiveType = request.MissionReceiveType;
+        await _db.SaveChangesAsync(ct);
+
+        var dto = await _assembler.BuildAsync(viewer, ct);
+        return Ok(dto);
+    }
+
+    private Task<Viewer> LoadViewer(long viewerId, CancellationToken ct) =>
+        _db.Viewers
+            .Include(v => v.MissionData)
+            .AsSplitQuery()
+            .FirstAsync(v => v.Id == viewerId, ct);
+}
diff --git a/SVSim.EmulatedEntrypoint/Models/Dtos/Mission/MissionChangeReceiveSettingRequest.cs b/SVSim.EmulatedEntrypoint/Models/Dtos/Mission/MissionChangeReceiveSettingRequest.cs
new file mode 100644
index 0000000..677a102
--- /dev/null
+++ b/SVSim.EmulatedEntrypoint/Models/Dtos/Mission/MissionChangeReceiveSettingRequest.cs
@@ -0,0 +1,13 @@
+using System.Text.Json.Serialization;
+using MessagePack;
+using SVSim.EmulatedEntrypoint.Models.Dtos.Requests;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Mission;
+
+[MessagePackObject]
+public class MissionChangeReceiveSettingRequest : BaseRequest
+{
+    [Key("mission_receive_type")]
+    [JsonPropertyName("mission_receive_type")]
+    public int MissionReceiveType { get; set; }
+}
diff --git a/SVSim.EmulatedEntrypoint/Models/Dtos/Mission/MissionRetireRequest.cs b/SVSim.EmulatedEntrypoint/Models/Dtos/Mission/MissionRetireRequest.cs
new file mode 100644
index 0000000..672e1a5
--- /dev/null
+++ b/SVSim.EmulatedEntrypoint/Models/Dtos/Mission/MissionRetireRequest.cs
@@ -0,0 +1,13 @@
+using System.Text.Json.Serialization;
+using MessagePack;
+using SVSim.EmulatedEntrypoint.Models.Dtos.Requests;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Mission;
+
+[MessagePackObject]
+public class MissionRetireRequest : BaseRequest
+{
+    [Key("id")]
+    [JsonPropertyName("id")]
+    public long Id { get; set; }
+}
diff --git a/SVSim.EmulatedEntrypoint/Services/ViewerMissionStateService.cs b/SVSim.EmulatedEntrypoint/Services/ViewerMissionStateService.cs
index 26c27bd..9e0059d 100644
--- a/SVSim.EmulatedEntrypoint/Services/ViewerMissionStateService.cs
+++ b/SVSim.EmulatedEntrypoint/Services/ViewerMissionStateService.cs
@@ -38,17 +38,19 @@ public sealed class ViewerMissionStateService : IViewerMissionStateService
 
     private async Task MaterializeAchievementsAsync(long viewerId, List<ViewerAchievement> existing, CancellationToken ct)
     {
-        var catalogTypes = await _catalog.GetAllAchievementTypesAsync(ct);
-        if (catalogTypes.Count == 0) return;
+        var minLevelByType = await _catalog.GetMinLevelByAchievementTypeAsync(ct);
+        if (minLevelByType.Count == 0) return;
         var existingTypes = existing.Select(a => a.AchievementType).ToHashSet();
-        foreach (var type in catalogTypes)
+        foreach (var (type, minLevel) in minLevelByType)
         {
             if (existingTypes.Contains(type)) continue;
+            // Start at the lowest captured tier — with captured-data-is-catalog, a "fresh" viewer
+            // is conceptually at whichever tier we first know about for that type.
             _viewerRepo.AddAchievement(new ViewerAchievement
             {
                 ViewerId = viewerId,
                 AchievementType = type,
-                Level = 1,
+                Level = minLevel,
                 AchievementStatus = 0,
                 NowAchievedLevel = 0,
                 ResultAnnounceSawLevel = 0,
diff --git a/SVSim.UnitTests/Controllers/MissionControllerTests.cs b/SVSim.UnitTests/Controllers/MissionControllerTests.cs
new file mode 100644
index 0000000..5810b66
--- /dev/null
+++ b/SVSim.UnitTests/Controllers/MissionControllerTests.cs
@@ -0,0 +1,253 @@
+using System.Net;
+using System.Net.Http.Json;
+using System.Text;
+using System.Text.Json;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.DependencyInjection;
+using SVSim.Bootstrap.Importers;
+using SVSim.Database;
+using SVSim.UnitTests.Infrastructure;
+
+namespace SVSim.UnitTests.Controllers;
+
+public class MissionControllerTests
+{
+    private static string SeedDir => Path.Combine(AppContext.BaseDirectory, "Data", "seeds");
+    private static StringContent JsonBody(string json) => new(json, Encoding.UTF8, "application/json");
+    private const string EmptyAuthBody = """{"viewer_id":"0","steam_id":0,"steam_session_ticket":""}""";
+
+    private static async Task ImportCatalogs(SVSimTestFactory f)
+    {
+        using var scope = f.Services.CreateScope();
+        var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
+        await new MissionCatalogImporter().ImportAsync(db, SeedDir);
+        await new AchievementCatalogImporter().ImportAsync(db, SeedDir);
+        await new BattlePassMonthlyMissionImporter().ImportAsync(db, SeedDir);
+    }
+
+    [Test]
+    public async Task Info_returns_assigned_missions_with_string_typed_lot_type()
+    {
+        using var factory = new SVSimTestFactory();
+        long viewerId = await factory.SeedViewerAsync();
+        await ImportCatalogs(factory);
+
+        using var client = factory.CreateAuthenticatedClient(viewerId);
+        var resp = await client.PostAsync("/mission/info", JsonBody(EmptyAuthBody));
+        var body = await resp.Content.ReadAsStringAsync();
+        Assert.That(resp.StatusCode, Is.EqualTo(HttpStatusCode.OK), body);
+
+        using var doc = JsonDocument.Parse(body);
+        var root = doc.RootElement;
+
+        var missions = root.GetProperty("user_mission_list");
+        Assert.That(missions.GetArrayLength(), Is.EqualTo(4), "expect 1 daily + 3 weekly slots");
+        // lot_type must be a JSON STRING per wire shape
+        Assert.That(missions[0].GetProperty("lot_type").ValueKind, Is.EqualTo(JsonValueKind.String));
+
+        // Daily mission (id 332) must have default_flag=true
+        bool foundDaily = false;
+        foreach (var m in missions.EnumerateArray())
+        {
+            if (m.GetProperty("mission_id").GetInt32() == 332)
+            {
+                foundDaily = true;
+                Assert.That(m.GetProperty("lot_type").GetString(), Is.EqualTo("6"));
+                Assert.That(m.GetProperty("default_flag").GetBoolean(), Is.True);
+            }
+        }
+        Assert.That(foundDaily, Is.True, "daily mission 332 must be assigned to slot 0");
+    }
+
+    [Test]
+    public async Task Info_returns_achievement_rows_with_derived_max_level()
+    {
+        using var factory = new SVSimTestFactory();
+        long viewerId = await factory.SeedViewerAsync();
+        await ImportCatalogs(factory);
+
+        using var client = factory.CreateAuthenticatedClient(viewerId);
+        var resp = await client.PostAsync("/mission/info", JsonBody(EmptyAuthBody));
+        resp.EnsureSuccessStatusCode();
+        var body = await resp.Content.ReadAsStringAsync();
+        using var doc = JsonDocument.Parse(body);
+
+        var achievements = doc.RootElement.GetProperty("user_achievement_list");
+        Assert.That(achievements.GetArrayLength(), Is.GreaterThan(0));
+        // Type 12 has 2 captured tiers (levels 6, 7) → max_level should be 7
+        foreach (var a in achievements.EnumerateArray())
+        {
+            if (a.GetProperty("achievement_type").GetInt32() == 12)
+            {
+                Assert.That(a.GetProperty("max_level").GetInt32(), Is.EqualTo(7));
+                return;
+            }
+        }
+        Assert.Fail("achievement type 12 not found in response");
+    }
+
+    [Test]
+    public async Task Info_includes_bp_monthly_for_may_2026_when_seeded()
+    {
+        using var factory = new SVSimTestFactory();
+        long viewerId = await factory.SeedViewerAsync();
+        await ImportCatalogs(factory);
+
+        using var client = factory.CreateAuthenticatedClient(viewerId);
+        var resp = await client.PostAsync("/mission/info", JsonBody(EmptyAuthBody));
+        resp.EnsureSuccessStatusCode();
+        var body = await resp.Content.ReadAsStringAsync();
+        using var doc = JsonDocument.Parse(body);
+
+        // The seed only has May 2026 BP monthly missions. If the test runs in a different month,
+        // the block will be omitted. This test asserts that EITHER the block is absent OR has 5
+        // entries — both are valid behaviors depending on calendar date.
+        if (doc.RootElement.TryGetProperty("battle_pass_monthly_mission", out var bp))
+        {
+            Assert.That(bp.GetProperty("mission_list").GetArrayLength(), Is.EqualTo(5));
+        }
+        // If not present, that's also valid: current month isn't in the seed.
+    }
+
+    [Test]
+    public async Task Info_can_change_mission_time_is_null_when_change_allowed()
+    {
+        using var factory = new SVSimTestFactory();
+        long viewerId = await factory.SeedViewerAsync();
+        await ImportCatalogs(factory);
+
+        using var client = factory.CreateAuthenticatedClient(viewerId);
+        var resp = await client.PostAsync("/mission/info", JsonBody(EmptyAuthBody));
+        var body = await resp.Content.ReadAsStringAsync();
+        using var doc = JsonDocument.Parse(body);
+        var root = doc.RootElement;
+
+        Assert.That(root.GetProperty("is_change_mission").GetBoolean(), Is.True);
+        var cct = root.GetProperty("can_change_mission_time");
+        Assert.That(cct.ValueKind, Is.EqualTo(JsonValueKind.Null),
+            "can_change_mission_time must serialize as explicit JSON null");
+    }
+
+    [Test]
+    public async Task Retire_swaps_weekly_slot_for_new_pool_member()
+    {
+        using var factory = new SVSimTestFactory();
+        long viewerId = await factory.SeedViewerAsync();
+        await ImportCatalogs(factory);
+
+        using var client = factory.CreateAuthenticatedClient(viewerId);
+        // First /mission/info to materialize slots
+        await client.PostAsync("/mission/info", JsonBody(EmptyAuthBody));
+
+        // Find a weekly mission to retire
+        long retireId; int originalCatalogId;
+        using (var scope = factory.Services.CreateScope())
+        {
+            var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
+            var weekly = await db.ViewerMissions.FirstAsync(m => m.ViewerId == viewerId && m.Slot == 1);
+            retireId = weekly.Id;
+            originalCatalogId = weekly.MissionCatalogId;
+        }
+
+        var retireBody = $$"""{"id":{{retireId}},"viewer_id":"0","steam_id":0,"steam_session_ticket":""}""";
+        var resp = await client.PostAsync("/mission/retire", JsonBody(retireBody));
+        var body = await resp.Content.ReadAsStringAsync();
+        Assert.That(resp.StatusCode, Is.EqualTo(HttpStatusCode.OK), body);
+
+        await using var verifyScope = factory.Services.CreateAsyncScope();
+        var db2 = verifyScope.ServiceProvider.GetRequiredService<SVSimDbContext>();
+        var slot1Now = await db2.ViewerMissions.FirstAsync(m => m.ViewerId == viewerId && m.Slot == 1);
+        Assert.That(slot1Now.MissionCatalogId, Is.Not.EqualTo(originalCatalogId),
+            "retire must replace the catalog id with a different one from the pool");
+    }
+
+    [Test]
+    public async Task Retire_sets_can_change_mission_time()
+    {
+        using var factory = new SVSimTestFactory();
+        long viewerId = await factory.SeedViewerAsync();
+        await ImportCatalogs(factory);
+
+        using var client = factory.CreateAuthenticatedClient(viewerId);
+        await client.PostAsync("/mission/info", JsonBody(EmptyAuthBody));
+
+        long retireId;
+        using (var scope = factory.Services.CreateScope())
+        {
+            var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
+            var weekly = await db.ViewerMissions.FirstAsync(m => m.ViewerId == viewerId && m.Slot == 1);
+            retireId = weekly.Id;
+        }
+
+        var retireBody = $$"""{"id":{{retireId}},"viewer_id":"0","steam_id":0,"steam_session_ticket":""}""";
+        var resp = await client.PostAsync("/mission/retire", JsonBody(retireBody));
+        var body = await resp.Content.ReadAsStringAsync();
+
+        using var doc = JsonDocument.Parse(body);
+        var root = doc.RootElement;
+        Assert.That(root.GetProperty("is_change_mission").GetBoolean(), Is.False);
+        Assert.That(root.GetProperty("can_change_mission_time").ValueKind, Is.EqualTo(JsonValueKind.Number));
+    }
+
+    [Test]
+    public async Task Retire_rejects_daily_slot()
+    {
+        using var factory = new SVSimTestFactory();
+        long viewerId = await factory.SeedViewerAsync();
+        await ImportCatalogs(factory);
+
+        using var client = factory.CreateAuthenticatedClient(viewerId);
+        await client.PostAsync("/mission/info", JsonBody(EmptyAuthBody));
+
+        long dailyId;
+        using (var scope = factory.Services.CreateScope())
+        {
+            var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
+            var daily = await db.ViewerMissions.FirstAsync(m => m.ViewerId == viewerId && m.Slot == 0);
+            dailyId = daily.Id;
+        }
+
+        var retireBody = $$"""{"id":{{dailyId}},"viewer_id":"0","steam_id":0,"steam_session_ticket":""}""";
+        var resp = await client.PostAsync("/mission/retire", JsonBody(retireBody));
+        var body = await resp.Content.ReadAsStringAsync();
+        Assert.That(body, Does.Contain("\"result_code\":2"),
+            "daily slot retire must fail with result_code = 2");
+    }
+
+    [Test]
+    public async Task Retire_rejects_id_not_owned_by_viewer()
+    {
+        using var factory = new SVSimTestFactory();
+        long viewerId = await factory.SeedViewerAsync();
+        await ImportCatalogs(factory);
+
+        using var client = factory.CreateAuthenticatedClient(viewerId);
+        var retireBody = """{"id":999999999,"viewer_id":"0","steam_id":0,"steam_session_ticket":""}""";
+        var resp = await client.PostAsync("/mission/retire", JsonBody(retireBody));
+        var body = await resp.Content.ReadAsStringAsync();
+        Assert.That(body, Does.Contain("\"result_code\":2"));
+    }
+
+    [Test]
+    public async Task ChangeReceiveSetting_persists_to_viewer_mission_data()
+    {
+        using var factory = new SVSimTestFactory();
+        long viewerId = await factory.SeedViewerAsync();
+        await ImportCatalogs(factory);
+
+        using var client = factory.CreateAuthenticatedClient(viewerId);
+        var changeBody = """{"mission_receive_type":1,"viewer_id":"0","steam_id":0,"steam_session_ticket":""}""";
+        var resp = await client.PostAsync("/mission/change_receive_setting", JsonBody(changeBody));
+        resp.EnsureSuccessStatusCode();
+
+        await using var scope = factory.Services.CreateAsyncScope();
+        var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
+        var refreshed = await db.Viewers.Include(v => v.MissionData)
+            .FirstAsync(v => v.Id == viewerId);
+        Assert.That(refreshed.MissionData.MissionReceiveType, Is.EqualTo(1));
+
+        var body = await resp.Content.ReadAsStringAsync();
+        using var doc = JsonDocument.Parse(body);
+        Assert.That(doc.RootElement.GetProperty("mission_receive_type").GetString(), Is.EqualTo("1"));
+    }
+}