diff --git a/SVSim.EmulatedEntrypoint/Controllers/FreeBattleController.cs b/SVSim.EmulatedEntrypoint/Controllers/FreeBattleController.cs
new file mode 100644
index 00000000..771b5fb3
--- /dev/null
+++ b/SVSim.EmulatedEntrypoint/Controllers/FreeBattleController.cs
@@ -0,0 +1,151 @@
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using SVSim.BattleNode.Bridge;
+using SVSim.Database.Enums;
+using SVSim.Database.Services.Friend;
+using SVSim.Database.Services.Replay;
+using SVSim.EmulatedEntrypoint.Constants;
+using SVSim.EmulatedEntrypoint.Extensions;
+using SVSim.EmulatedEntrypoint.Matching;
+using SVSim.EmulatedEntrypoint.Models.Dtos.FreeBattle;
+using SVSim.EmulatedEntrypoint.Models.Dtos.Requests;
+using SVSim.EmulatedEntrypoint.Security.SteamSessionAuthentication;
+using SVSim.EmulatedEntrypoint.Services;
+
+namespace SVSim.EmulatedEntrypoint.Controllers;
+
+/// <summary>
+/// Free battle family — casual / unranked human PvP. No AI variant exists in the client
+/// (see ApiType.cs), so the controller has no /start, no AI /finish branch, and no
+/// rank-progression fields on the response. Multi-prefix URLs (rotation_free_battle/,
+/// unlimited_free_battle/, free_battle/force_finish) use explicit absolute route
+/// attributes per action — does not extend SVSimController's [Route("[controller]")].
+///
+/// Mirrors RankBattleController for now; consolidation deferred — see the design doc.
+/// </summary>
+[ApiController]
+[Authorize(AuthenticationSchemes = SteamAuthenticationConstants.SchemeName)]
+public sealed class FreeBattleController : ControllerBase
+{
+    private readonly IMatchingResolver _resolver;
+    private readonly IMatchContextBuilder _ctxBuilder;
+    private readonly IBattleContextStore _battleContextStore;
+    private readonly IBattleHistoryWriter _historyWriter;
+    private readonly IPlayedTogetherWriter _playedTogetherWriter;
+    private readonly ILogger<FreeBattleController> _log;
+
+    public FreeBattleController(
+        IMatchingResolver resolver,
+        IMatchContextBuilder ctxBuilder,
+        IBattleContextStore battleContextStore,
+        IBattleHistoryWriter historyWriter,
+        IPlayedTogetherWriter playedTogetherWriter,
+        ILogger<FreeBattleController> log)
+    {
+        _resolver = resolver;
+        _ctxBuilder = ctxBuilder;
+        _battleContextStore = battleContextStore;
+        _historyWriter = historyWriter;
+        _playedTogetherWriter = playedTogetherWriter;
+        _log = log;
+    }
+
+    private bool TryGetViewerId(out long viewerId)
+    {
+        viewerId = 0;
+        var claim = User.Claims.FirstOrDefault(c => c.Type == ShadowverseClaimTypes.ViewerIdClaim)?.Value;
+        return claim is not null && long.TryParse(claim, out viewerId);
+    }
+
+    [HttpPost("/rotation_free_battle/do_matching")]
+    public Task<IActionResult> DoMatchingRotation([FromBody] DoMatchingRequestDto req, CancellationToken ct)
+        => DoMatchingInternal("rotation_free_battle", Format.Rotation, req, ct);
+
+    [HttpPost("/unlimited_free_battle/do_matching")]
+    public Task<IActionResult> DoMatchingUnlimited([FromBody] DoMatchingRequestDto req, CancellationToken ct)
+        => DoMatchingInternal("unlimited_free_battle", Format.Unlimited, req, ct);
+
+    /// <summary>
+    /// Shared finish handler — FreeBattleFinishTask sends the same wire shape across
+    /// all six format URLs (only rotation + unlimited are routed here in v1).
+    /// </summary>
+    [HttpPost("/rotation_free_battle/finish")]
+    [HttpPost("/unlimited_free_battle/finish")]
+    public async Task<IActionResult> Finish([FromBody] FreeBattleFinishRequestDto req, CancellationToken ct)
+    {
+        if (!TryGetViewerId(out var vid)) return Unauthorized();
+
+        var ctx = _battleContextStore.TakeFor(vid);
+        bool isWin = req.BattleResult == 1;
+
+        await _historyWriter.RecordAsync(vid, ctx, isWin, ct);
+
+        // Played-together only fires for human PvP. Free battle has no AI variant, so
+        // any non-null ctx with an OpponentViewerId > 0 is a real PvP pair.
+        if (ctx is { OpponentViewerId: > 0 })
+        {
+            await _playedTogetherWriter.RecordAsync(
+                vid,
+                ctx.OpponentViewerId,
+                new BattleParticipationContext(
+                    PlayedMode: 0,
+                    // Wire battle_type: 3 = free battle (per docs/api-spec/common/types.ts.md
+                    // — NetworkDefine.ServerBattleType.Free).
+                    BattleType: 3,
+                    DeckFormat: ctx.DeckFormat,
+                    TwoPickType: ctx.TwoPickType),
+                ct);
+        }
+
+        return Ok(new FreeBattleFinishResponseDto
+        {
+            BattleResult = req.BattleResult,
+            // All other fields default to 0 (ClassLevel defaults to 1).
+        });
+    }
+
+    /// <summary>
+    /// Defensive no-op for the family-wide force_finish URL. Per
+    /// Shadowverse_Code_2026-05-23/ApiType.cs the URL is registry-only — no client task
+    /// constructs it. Returning empty {} matches the rank-battle treatment.
+    /// </summary>
+    [HttpPost("/free_battle/force_finish")]
+    public IActionResult ForceFinish([FromBody] BaseRequest _)
+    {
+        if (!TryGetViewerId(out var _u)) return Unauthorized();
+        return Ok(new { });
+    }
+
+    private async Task<IActionResult> DoMatchingInternal(
+        string mode, Format format, DoMatchingRequestDto req, CancellationToken ct)
+    {
+        if (!TryGetViewerId(out var vid)) return Unauthorized();
+
+        MatchContext ctx;
+        try
+        {
+            // BuildForRankBattleAsync is name-misleading — it builds a generic MatchContext
+            // from (viewer, format, deckNo). Rename slated for cleanup at consolidation time.
+            ctx = await _ctxBuilder.BuildForRankBattleAsync(vid, format, req.DeckNo);
+        }
+        catch (InvalidOperationException ex)
+        {
+            // Most likely cause: viewer has no deck at that slot for this format. Surface
+            // as 3001 RC_BATTLE_MATCHING_ILLEGAL — the client shows the standard
+            // matchmaking-error dialog rather than retrying forever.
+            _log.LogWarning(ex, "BuildForRankBattleAsync failed for viewer {Vid} format {Fmt} deckNo {DeckNo}; returning 3001.", vid, format, req.DeckNo);
+            return Ok(new DoMatchingResponseDto { MatchingState = 3001, NodeServerUrl = "" });
+        }
+
+        var r = await _resolver.ResolveAsync(mode, new BattlePlayer(vid, ctx), ct);
+
+        return Ok(new DoMatchingResponseDto
+        {
+            MatchingState = r.MatchingState,
+            BattleId = r.BattleId,
+            NodeServerUrl = r.NodeServerUrl,
+            // Placeholder per spec — per-battle card-master split is deferred.
+            CardMasterId = 0,
+        });
+    }
+}
diff --git a/SVSim.UnitTests/RoutingSmokeTests.cs b/SVSim.UnitTests/RoutingSmokeTests.cs
index e78f761b..6abfb36a 100644
--- a/SVSim.UnitTests/RoutingSmokeTests.cs
+++ b/SVSim.UnitTests/RoutingSmokeTests.cs
@@ -141,6 +141,11 @@ public class RoutingSmokeTests
     [TestCase("/rank_battle/add_all_client_log")]
     [TestCase("/rank_battle/add_last_turn_log")]
     [TestCase("/rank_battle/get_latest_master_point")]
+    [TestCase("/rotation_free_battle/do_matching")]
+    [TestCase("/unlimited_free_battle/do_matching")]
+    [TestCase("/rotation_free_battle/finish")]
+    [TestCase("/unlimited_free_battle/finish")]
+    [TestCase("/free_battle/force_finish")]
     public async Task Authenticated_route_resolves(string path)
     {
         using var factory = new TestFactory();