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Progress metrics

This page tracks progress toward 100% fidelity with the original game.

Feature parity dashboard

Legend: ✅ complete · 🚧 in progress · ⬜ not started

Feature Scoping Analysis Validation Parity Notes
Formats (PAQ/JAZ) ✅ ✅ ✅ ✅ Full extraction & conversion pipeline working.
Quest Logic ✅ ✅ ✅ ✅ All 50 builders dumped, validated, and mirrored in Python.
Terrain ✅ ✅ ✅ 🚧 Rendering logic validated; decal baking wired into Survival.
Boot Sequence ✅ ✅ ✅ 🚧 Logos, loading steps, and music handoff implemented.
Menu System ✅ ✅ 🚧 🚧 State 0: quit wired; panel/back positions + slide animation match; terrain stable across menu screens; sign shadow pass matches when fx_detail is enabled.
Demo / attract loop ✅ 🚧 ⬜ 🚧 Variants + spawn ids identified; idle trigger + variant sequencing implemented (idle threshold still TODO); trial overlay implemented (demo-build validation pending).
Weapons ✅ ✅ 🚧 🚧 Core weapons (pistol/AR/shotgun/minigun/rocket) use pellet spread + rocket splash; basic fire/reload/hit SFX hooks wired; remaining special weapons pending.
Creatures: structs ✅ 🚧 ⬜ ⬜ Creature pool field map is medium-confidence; needs more xrefs + runtime checks.
Creatures: spawning ✅ 🚧 ⬜ ⬜ Spawn templates are an algorithm (formations/spawn slots/tail mods); plan rewrite started.
Creatures: animations ✅ 🚧 ⬜ ⬜ Atlas/frame selection wired into Survival; parity tuning in progress.
Creatures: AI ✅ 🚧 ⬜ ⬜ AI modes partially mapped; needs runtime evidence and edge cases.
Creatures: other ✅ 🚧 ⬜ 🚧 Contact damage/death/bonus hooks live; death SFX hooks wired; ranged attacks + full audio behaviors pending.
Player ✅ ✅ 🚧 ⬜ Input & movement mapped; state struct partially validated.
Grim2D ✅ ✅ ✅ ⬜ Vtable mapped & validated; implementation deferred.
Save/Config ✅ ✅ ⬜ ⬜ File formats reversed; editor tools built.

Ghidra maps

Map Total entries crimsonland.exe grim.dll With signatures With comments Duplicate names
Name map 1167 695 472 1147 1144 0
Data map 855 754 101 n/a 855 0

Decompiled data symbol coverage

Program Labeled symbols Total data symbols Coverage
crimsonland.exe 387 2576 15.02%
grim.dll 84 479 17.54%
Total 471 3055 15.42%

Status definitions

See Work status model for the full lifecycle:

  1. Scoping — We know it exists; location identified
  2. Analysis — Static analysis complete; logic mapped in Ghidra
  3. Validation — Runtime-confirmed via Frida/WinDbg
  4. Parity — Reimplemented in Python; matches original exactly

Known behavior deltas

Intentional divergences from the original:

  • None recorded yet.

Demo / attract loop tasks (rewrite)

Legend: ✅ complete · 🚧 in progress · ⬜ not started

  • ✅ Identify spawn ids used by demo variants (0x24, 0x25, 0x34, 0x35, 0x38, 0x41) and port to spawn-plan rewrite.
  • ✅ Fix demo loop sequencing to match demo_mode_start (variant index modulo 6, purchase interstitial timing, restart rules).
  • ✅ Add menu idle timer trigger (attract starts after inactivity; resets on input).
  • ✅ Implement demo upsell overlay (upsell "Want more ..." message + progress bar).
  • ✅ Implement demo_trial_overlay_render UI + timing rules.
  • ⬜ Validate trial overlay behavior against a demo build.
  • ✅ Implement full demo_purchase_screen_update purchase screen UI.
  • ✅ Replace DemoView toy simulation with real gameplay systems (creature alloc/update, weapons/projectiles, collision/damage, terrain bounds).