The system requirements for Ready or Not v39903 are as follows:
If you are a modder or archivist testing deprecated builds, here is the typical workflow:
Fix: Ensure cream_api.ini uses the exact DLC AppIDs. Open SteamDB, search “Ready or Not DLC,” and verify numbers.
Notably, VOID Interactive has responded by in patches after v40000, making partial unlocks much harder. v39903 represents the last easily modifiable build.