diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..4a2d8a4
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,52 @@
+# Changelog
+
+Versioning applies to the collection as a whole: **adding a game is a minor bump**,
+fixes/tuning to existing entries are patch bumps.
+
+## v1.2.0 — Clair Obscur: Expedition 33
+
+- **New game: Clair Obscur: Expedition 33** (Unreal Engine 5, no DRM) — ⚠️ partial support.
+  Adds a third install method, `external`: where a good third-party fix already
+  exists and its license allows redistribution, it is vendored **unmodified**
+  with our tuned config and full credit, rather than reimplemented.
+  The fix itself is [ClairObscurFix](https://github.com/Lyall/ClairObscurFix)
+  by **Lyall** (MIT).
+- Ships a **reduced profile** (only `Center HUD` enabled). Upstream v0.0.10 is
+  archived and predates current game builds; with full features it crashed on
+  save load. Documented with a revalidation checklist rather than marked working.
+- `publish.sh` now cuts **one release for the whole collection**, attaching every
+  game's zip, and replaces same-named assets so re-runs are idempotent.
+
+## v1.1.0 — Burglin' Gnomes *(never released; folded into v1.2.0)*
+
+- **New game: Burglin' Gnomes** (Unity 6, Mono) — ✅ confirmed working at 5120×1440.
+  Adds the `bepinex` install method and a purpose-built C# plugin.
+- Camera deliberately untouched: it is orthographic with a constant
+  `orthographicSize`, which is already correct Hor+ at 32:9. The entire problem
+  was UI scaling.
+- Fixes HUD canvases (`match=1` + raised `referenceResolution.y`) and world-space
+  labels (canvas `localScale` — `CanvasScaler.scaleFactor` is overwritten every
+  frame for WorldSpace canvases).
+- Config reloads live (~2s) without a game restart.
+
+## v1.0.0 — Gundam Breaker 4
+
+- **New game: Gundam Breaker 4** (Unreal Engine 4.27, SteamStub DRM) — ✅ confirmed
+  working at 5120×1440.
+- Forces Hor+ FOV via `AspectRatioAxisConstraint = MaintainYFOV` and disables
+  pillarboxing, patched in decrypted memory at runtime with
+  [SUWSF](https://github.com/PhantomGamers/SUWSF) — the exe is DRM-encrypted on
+  disk, so static patching is impossible.
+
+---
+
+### Unreleased infrastructure changes
+
+These landed between v1.0.0 and v1.2.0 and are not tied to a single game:
+
+- Restructured from a single-game repo into a multi-game collection
+  (`games/<Game>/` + `game.conf`), so `install.sh` is game-agnostic.
+  **Note:** `./install.sh` now requires a game name; run it bare to list games.
+- Migrated hosting from GitHub to self-hosted Gitea.
+- `publish.sh` rewritten for the Gitea API; reads `GITEA_TOKEN` from the
+  environment and never stores it.
diff --git a/README.md b/README.md
index 500a3eb..2a56ac0 100644
--- a/README.md
+++ b/README.md
@@ -63,6 +63,10 @@ Config-file tweaks (e.g. UE4's `AspectRatioAxisConstraint=MaintainYFOV`) typical
 3. **Unreal:** start from the UE4 patterns in [`games/GundamBreaker4/SUWSF.ini`](games/GundamBreaker4/SUWSF.ini) — they match across many UE4 titles. If a pattern misses, use `tools/dump_decrypted.py` + `tools/aob.py` to derive the exact bytes.
 4. **Unity:** install BepInEx + UnityExplorer and inspect live with [`tools/unity_diag.cs`](tools/unity_diag.cs) / [`tools/unity_uitune.cs`](tools/unity_uitune.cs), then write a plugin (copy `games/BurglinGnomes/plugin/`).
 
+## Changelog
+
+Version history and the versioning policy (adding a game = minor bump) are in [CHANGELOG.md](CHANGELOG.md).
+
 ## License
 
 MIT — see [LICENSE](LICENSE). Bundled third-party components (SUWSF, Ultimate ASI Loader) are MIT and credited in [THIRD_PARTY.md](THIRD_PARTY.md). You must own the games; nothing here modifies or circumvents copy protection.
diff --git a/tools/publish.sh b/tools/publish.sh
index d316dec..b87cab2 100755
--- a/tools/publish.sh
+++ b/tools/publish.sh
@@ -17,7 +17,7 @@ GAME="${GAME:-all}"
 if [ "$GAME" = "all" ]; then
   GAME=$(for d in games/*/; do [ -f "$d/game.conf" ] && basename "$d"; done | tr '\n' ' ')
 fi
-TAG="${TAG:-v1.0.0}"
+TAG="${TAG:?set TAG explicitly, e.g. TAG=v1.2.0 (see CHANGELOG.md)}"
 # Single game -> its own README; multiple -> the collection README.
 if [ "$(echo "$GAME" | wc -w)" -eq 1 ] && [ -f "games/$GAME/README.md" ]; then
   NOTES="${NOTES:-games/$GAME/README.md}"