OpenBattlefield2: an unfinished Refractor 2 engine reimplementation

Requirements & limits

• Prerequisites: Requires an owned Battlefield 2 1.5 installation, CMake 3.24+, Ninja, a C++20 compiler and SDL3; the Flash menu additionally needs Rust and Ruffle.
• Attribution: Published crosshair research cites REA Evidence IDs; CLAUDE.md describes the mixed REA/Ghidra workflow and its payload and temporary-project limitations. This attribution does not establish that every subsystem was reconstructed with REA.
• Testing evidence: macOS arm64 is the primary platform; the Windows preset is kept building but is not exercised. Tests needing game files can pass with a note when those files are absent.
• Limits: Ammunition/reloading, recoil, projectiles, audio, driving and full commander/squad interaction remain unfinished; this is an engine research project, not a complete game port.
• License: MIT covers the project code; no original Battlefield 2 game content is redistributed.

About this entry

Type

Case study

Category

Community REA investigations

Relationship

Author-reported mixed workflow

Targets

Binary · Game

Sources reviewed 2026-11-01

The description was reviewed against primary sources. This does not establish runtime testing, security auditing or verified compatibility.

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Primary sources

1. README.md GitHub · Moxnatiy/OpenBattlefield2 · Revision 1486ef1
2. CLAUDE.md GitHub · Moxnatiy/OpenBattlefield2 · Revision 1486ef1
3. docs/functions/hud-crosshair.md GitHub · Moxnatiy/OpenBattlefield2 · Revision 1486ef1