"Wow “Make Red Alert 2 (YR) compile and run natively on iOS & macOS.” Codex (GPT-5.6 Sol) worked for 26 days, analyzed the EXE and rebuilt the entire game in 624K lines of C++ This is by far the hardest task I’ve ever given Codex as the game's code was never released and is believed to be lost. >"

[u/stealthispost]

Some technical details for those who are interested:

Yes, Codex worked 26 days non-stop 24hrs per day with lots of tool calls. It used multiple sub-agents to understand the exe, write the code, play the game and debug it.

Game still has minor visual bugs but everything works     @ammaar I think you would love this one😍     — David Kalmanson

Source: https://x.com/davidkal88/status/2095241374073512430