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THIS IS F*CKING UNREAL! AI AGENTS ARE REBUILDING A 1996 WINDOWS GAME WITH NOTHING BUT THE .EXE the game is DX-Ball. no source code. no docs. just the original executable and REA, the MIT-licensed reverse engineering MCP sitting at 238,000 stars on GitHub the goal: a clean, maintainable C version of the whole game, recovered 1 function at a time here's 1 function, start to finish question: when a brick breaks, which speaker plays the sound? the agent asked REA 3 things: → analyze_function 0x406400 - the decompiler said the function was empty. the raw instructions showed a hidden integer input → follow the caller - the brick-hit code turns a tile into a screen position: 20 + 30 × tile_x → read_bytes - 2 constants buried in the .exe decode to 1.5625 and 500.0 the whole formula: pan = (x × 1.5625 − 500.0) × scale -500 on the left edge. 0 in the middle. +500 on the right then it had to prove it wasn't guessing: > 3,205 test cases run against the original x86 code > every position from 0 to 640, at 5 pan scales > recompiled with the 1996-era compiler: all 63 bytes identical the project so far: > 55 functions rewritten in C > 45,380 checks against the original > 33 functions that compile byte-for-byte the same and it's not just old games. REA covers 23 target types: native binaries through Hopper, Ghidra or IDA, Electron apps, .NET, Android APKs, websites, firmware, network captures 1 command to start: npx rea-agents setup then hand your agent a binary you're allowed to inspect and paste this: "Use REA to recover 1 function from this executable 1. Analyze the function and its callers. Show the instructions behind every claim, not just the pseudocode 2. Read and decode every constant or global it depends on 3. Write a C version with the same inputs and outputs 4. Build a test that runs the original and your version across the full input range. Report every mismatch" start with 1 small function you can fully verify the decompiler said empty. the bytes said otherwise.
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full case study: https://github.com/morluto/rea https://rea.tools/showcase/dx-bal
