Fix steam_api64.dll and steam_api.dll Missing Errors
Steam API DLL errors are common in pirated games, but can also occur in legitimate copies. Here's how to fix them properly.
Table of Contents
Why This Error Occurs
The steam_api64.dll (64-bit) and steam_api.dll (32-bit) files are Steam's integration libraries.
Common causes: 1. Pirated games: Cracks often replace or remove Steam DLLs, which antiviruses quarantine. 2. Antivirus quarantine: Even legitimate DLLs get flagged as "HackTool". 3. Corrupted game files: Steam download was interrupted or corrupted. 4. Missing Steam client: Game requires Steam running in background.
Solution 1: Verify Game Files (For Legitimate Steam Games)
Step 1: Open Steam.
Step 2: Go to Library > Right-click the game > Properties.
Step 3: Click "Local Files" > "Verify integrity of game files".
Step 4: Wait for verification (may take several minutes).
Steam will re-download any missing or corrupted files, including steam_api.dll.
Solution 2: Add Antivirus Exception
Many antiviruses (especially Windows Defender) flag steam_api.dll as a "HackTool".
For Windows Defender: 1. Open Windows Security > Virus & threat protection. 2. Click "Protection history". 3. Find the quarantined steam_api.dll, click "Restore". 4. Add the game folder to exclusions: Virus & threat protection settings > Manage exclusions > Add an exclusion.
For other antiviruses: Check your quarantine/vault and restore the file, then whitelist the game folder.
Solution 3: Reinstall Steam
If multiple games have Steam API errors:
Step 1: Uninstall Steam via Control Panel (your games will be preserved).
Step 2: Download fresh Steam installer from store.steampowered.com.
Step 3: Install Steam to the same location.
Step 4: Your games should be detected automatically.
For Non-Steam Games
Some games sold on other platforms (GOG, Epic) may include Steam API for achievements or multiplayer.
Options: 1. Check if the game has a non-Steam version (DRM-free from GOG). 2. Copy steam_api.dll from another game that works. 3. Install the Steam client even if you don't own the game there.
Warning: Do NOT download steam_api.dll from random websites - it's a prime target for malware injection.