Unlike the official steam_api64.dll (used by legitimate Steam games), the file is almost exclusively associated with game cracks and emulators (like Goldberg or SSE – Smart Steam Emulator). Legitimate Steam games do not use the "r" variant.
If a game is asking for this file, you are likely running a or a repack (e.g., from FitGirl, DODI, or Codex/RUNE). This file acts as a bridge, tricking the game into thinking Steam is running when it isn't. steamapi64rdll free fixed download work
If steam_api64r.dll is there, select and then add the game folder to your antivirus exclusions list so it doesn't get deleted again. Verify Game Files : Unlike the official steam_api64
The error can stem from several causes: