Confirmed classes, methods, RVAs and field offsets from reverse engineering (single game build)

Internals Reference

Classes, methods and field offsets found by reverse engineering the game. In BepInEx code, use the names; the numbers are for locating the same member in a dump or decompiler.

How these were obtained

Names, field offsets and RVAs come from the dump.cs produced by Il2CppDumper (input: GameAssembly.dll and global-metadata.dat).
Behavior notes (what a method really checks, call order, data layouts) come from decompiling the same binary in Ghidra after applying Il2CppDumper's Ghidra script. For a PE file Ghidra's address is 0x180000000 + RVA.
Anything marked as tested was also confirmed by a live run in game.

Build specific

All RVAs and offsets are from one game build. They move after a game update; re-run Il2CppDumper to get new ones, and rely on the names.

RVAs are relative to the base of GameAssembly.dll.

Methods

Class	Method	RVA	Notes
`Cheats`	`get_Available`	`0x52A840`	force `true` to enable dev console
`Cheats`	`CheckAvailable`	`0x528D40`	force `true`
`IslandGrid`	`Awake`	`0x6130C0`	good place to set `HardLimit.radius`
`IslandGrid`	`CanPlaceBuilding`	`0x6143A0`
`IslandGrid`	`ImportIsland`	`0x616340`	private, patchable
`IslandGrid`	`ExportIsland`	`0x614900`
`IslandGrid`	`Generate`	`0x614EB0`
`IslandGrid`	`GenerateJob`	`0x614D90`
`IslandGrid`	`SaveIslandToClipboard`	`0x61A690`	unreliable (see below)
`IslandGrid`	`LoadIslandFromClipboard`	`0x616810`	unreliable (see below)
`Island`	`get_Owner`	`0x61F7D0`
`Player`	`get_UserName`	`0x473BB0`
`Player`	`get_StartGameReady`	`0x571AB0`
`Player`	`get_Island`	`0x508770`
`PlayerSummary`	`Update`	`0x5AA420`
`PlayerSummary`	`OnSyncPhase`	`0x5AA1A0`
`GameState`	`Island(Player)`	`0x5F2F60`
`GameState`	`Update`	`0x5F70E0`	per-frame patch point
`BuildData`	`CanBuildType`	`0x628760`	`IsBuildable` -> `Unlocked` -> `SteamDemo` -> `HasResource`
`BuildData`	`CanRemoveNature`	`0x6288B0`	inline check: TREE / ROCK / SCORCHED_EARTH / LAVA
`BuildData`	`CleanTile`	`0x628AB0`
`NatureTile`	`Cleanable`	`0x61FE70`	not called by `CanRemoveNature`
`CleanTileTool`	`Use`	`0x589B90`	only fires a `UnityEvent`
`CleanTileTool`	`Yield`	`0x589CF0`
`BuildingType`	`get_DisplayName`	`0x5F0E10`
`BuildingTypes`	`get_Types`	`0x5717B0`	ids in save-file order; did not fire in testing, see below
`RulesBuilding`	`OnEnable`	`0x5471E0`	holds `BuildingTypes` at `+0x18`
`GridTransform`	`Transform`	`0x6105D0`	point + rotation + translation

Fields

Class	Field	Offset
`IslandGrid`	`size` (`int2`)	`0xF0`
`IslandGrid`	`generationParameters`	`0x1E8` (`HardLimit.radius` at `+0`)
`IslandGrid`	`snapshotIslandSize`	`0x298`
`IslandGrid`	`arraySize`	`0x2AC`
`Island`	`grid`	`0x98`
`Island`	`owner` (`NetworkedVar<Player>`)	`0x90`
`Player`	`UserName` (`string`)	`0x110`
`PlayerSummary`	`island`	`0xD0`
`PlayerSummary`	`attackers` (`List<Image>`)	`0xE8` (`_size` at `+0x18`)
`PlayerSummary`	`gameState`	`0xC8`
`BuildingType`	`localPositions` (`int2[]`)	`0x18`
`BuildingType`	`localPositionsInWater`	`0x20`
`BuildingType`	`id`	`0x10`
`BuildingType`	`tier` / `maxHealth`	`0x78` / `0x80`
`BuildingType`	cost block	`0x58 - 0x74`
`BuildData`	island grid chain	`+0xA0` -> grid `+0x98`
`UnlockBuildingTechnology`	`BuildingTypes*` / id	`0x38` / `0x40`

Known quirks

BuildingTypes.get_Types did not fire when patched late, even with buildings on screen: the BuildingTypes object is created before a late patch is applied (RulesBuilding.OnEnable). BuildData.Unlocked(BuildingType) is called repeatedly, so a patch on it can capture a BuildingType, and from there the BuildingType[] that contains it. Patching early (plugin Load) may avoid the problem - untested.
SaveIslandToClipboard / LoadIslandFromClipboard rely on GUIUtility.systemCopyBuffer and were unreliable when called outside OnGUI. Prefer calling ExportIsland / ImportIsland and handling the clipboard yourself.