Only download DLLs from trusted sources. Never use "DLL download" sites—they often contain malware. Instead, extract from a working copy.
You might see the steam-api64r.dll error phrased in several ways:
There are few things more frustrating in the PC gaming world than preparing for a session of your favorite game—perhaps a AAA title like Elden Ring , Cyberpunk 2077 , or a classic from your backlog—only to be greeted by a stark, white error message the moment you hit "Play." steam-api64r.dll error
Malware can delete or replace DLL files. Run a full scan with:
Work through these methods in order. Start with the simplest (Method 1) and escalate only if needed. Only download DLLs from trusted sources
While you can’t automate verification easily, make it a habit: every time Steam updates a game, run a manual verification a few days later to catch corruption early.
Here is where things get interesting. The standard file is steam_api64.dll . The file causing your error is steam-api64r.dll (note the lowercase 'r' at the end, or sometimes separated by a dash). You might see the steam-api64r
If you legally own the game on Steam, this is the absolute best way to fix the issue. It forces Steam to scan your installation folder, identify the missing or corrupted file, and replace it with a fresh, legitimate copy from Valve’s servers.
Wait for completion. This repairs Windows system files but not game-specific DLLs.