diff --git a/SVSim.UnitTests/Controllers/TutorialFlowEndToEndTests.cs b/SVSim.UnitTests/Controllers/TutorialFlowEndToEndTests.cs
new file mode 100644
index 0000000..b2e02fe
--- /dev/null
+++ b/SVSim.UnitTests/Controllers/TutorialFlowEndToEndTests.cs
@@ -0,0 +1,110 @@
+using System.Net;
+using System.Text;
+using System.Text.Json;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.DependencyInjection;
+using NUnit.Framework;
+using SVSim.Database;
+using SVSim.Database.Enums;
+using SVSim.Database.Models;
+using SVSim.UnitTests.Infrastructure;
+
+namespace SVSim.UnitTests.Controllers;
+
+public class TutorialFlowEndToEndTests
+{
+    [Test]
+    public async Task FreshSignup_through_pack_open_reaches_tutorial_step_100()
+    {
+        using var factory = new SVSimTestFactory();
+        await factory.SeedGlobalsAsync();
+
+        // Fresh viewer at PRE_TUTORIAL_STEP (the real prod default after Task 1).
+        long viewerId = await factory.SeedViewerAsync(tutorialState: 0);
+
+        // Pack 99047 (starter legendary) has base_pack_id=90001. Seed the card set used by
+        // the tutorial pack pool resolver — mirrors the pattern in PackControllerTests.
+        using (var scope = factory.Services.CreateScope())
+        {
+            var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
+            db.CardSets.Add(new ShadowverseCardSetEntry
+            {
+                Id = 90001,
+                Name = "TutorialStarterSet",
+                IsInRotation = true,
+                IsBasic = false,
+                Cards =
+                [
+                    new ShadowverseCardEntry { Id = 90001001L, Name = "StarterCard1", Rarity = Rarity.Bronze },
+                    new ShadowverseCardEntry { Id = 90001002L, Name = "StarterCard2", Rarity = Rarity.Gold },
+                    new ShadowverseCardEntry { Id = 90001003L, Name = "StarterCard3", Rarity = Rarity.Legendary },
+                ],
+            });
+            await db.SaveChangesAsync();
+        }
+
+        using var client = factory.CreateAuthenticatedClient(viewerId);
+
+        var preCurrency = await factory.GetViewerCurrencyAsync(viewerId);
+
+        // 1. /account/update_name (after name-entry screen).
+        var nameResp = await Post(client, "/account/update_name",
+            """{"name":"e2e_test_user","viewer_id":"0","steam_id":0,"steam_session_ticket":""}""");
+        Assert.That(nameResp.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+
+        // 2. Step transitions observed in capture: 11 → 21 → 31.
+        foreach (var step in new[] { 11, 21, 31 })
+        {
+            var json = $$"""{"tutorial_step":{{step}},"is_skip":0,"viewer_id":"0","steam_id":0,"steam_session_ticket":""}""";
+            var resp = await Post(client, "/tutorial/update", json);
+            using var doc = JsonDocument.Parse(await resp.Content.ReadAsStringAsync());
+            Assert.That(doc.RootElement.GetProperty("tutorial_step").GetInt32(), Is.EqualTo(step));
+        }
+
+        // 3. /tutorial/update_action — a couple of representative sub-step calls.
+        await Post(client, "/tutorial/update_action",
+            """{"tutorial_step":1,"tutorial_action_number":2,"viewer_id":"0","steam_id":0,"steam_session_ticket":""}""");
+
+        // 4. /tutorial/gift_top — surface the bundle.
+        var topResp = await Post(client, "/tutorial/gift_top",
+            """{"page":1,"viewer_id":"0","steam_id":0,"steam_session_ticket":""}""");
+        using (var doc = JsonDocument.Parse(await topResp.Content.ReadAsStringAsync()))
+        {
+            Assert.That(doc.RootElement.GetProperty("present_list").GetArrayLength(), Is.EqualTo(5));
+        }
+
+        // 5. /tutorial/gift_receive — claim them.
+        var receiveResp = await Post(client, "/tutorial/gift_receive",
+            """{"present_id_array":["71478630","71478629","71478628","71478627","71478626"],"state":1,"viewer_id":"0","steam_id":0,"steam_session_ticket":""}""");
+        Assert.That(receiveResp.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+
+        var midCurrency = await factory.GetViewerCurrencyAsync(viewerId);
+        Assert.That(midCurrency.Crystals - preCurrency.Crystals, Is.EqualTo(400UL));
+        Assert.That(midCurrency.Rupees - preCurrency.Rupees, Is.EqualTo(100UL));
+
+        // gift_receive should also have advanced the tutorial step to 41 server-side.
+        Assert.That(await factory.GetViewerTutorialStateAsync(viewerId), Is.EqualTo(41));
+
+        // 6. /tutorial/pack_info — show the 3 active packs.
+        var packInfoResp = await Post(client, "/tutorial/pack_info",
+            """{"viewer_id":"0","steam_id":0,"steam_session_ticket":""}""");
+        Assert.That(packInfoResp.StatusCode, Is.EqualTo(HttpStatusCode.OK));
+
+        // 7. /tutorial/pack_open of the starter legendary pack — END transition.
+        var openBody = """{"parent_gacha_id":99047,"gacha_id":990047,"gacha_type":1,"pack_number":1,"exclude_card_ids":[],"viewer_id":"0","steam_id":0,"steam_session_ticket":""}""";
+        var openResp = await Post(client, "/tutorial/pack_open", openBody);
+        var openRespBody = await openResp.Content.ReadAsStringAsync();
+        Assert.That(openResp.StatusCode, Is.EqualTo(HttpStatusCode.OK), openRespBody);
+
+        using (var doc = JsonDocument.Parse(openRespBody))
+        {
+            Assert.That(doc.RootElement.GetProperty("tutorial_step").GetInt32(), Is.EqualTo(100));
+        }
+
+        Assert.That(await factory.GetViewerTutorialStateAsync(viewerId), Is.EqualTo(100),
+            "Viewer reaches TUTORIAL_END after the full flow.");
+    }
+
+    private static Task<HttpResponseMessage> Post(HttpClient client, string url, string body)
+        => client.PostAsync(url, new StringContent(body, Encoding.UTF8, "application/json"));
+}