Grand Theft Auto IV: Complete Edition — Steam Launch Options

DeveloperRockstar North

PublisherRockstar Games

-windowed

Run the game in windowed mode instead of fullscreen

manual_curation
✅ Verified
mangohud

Proton/Wine compatibility option.

ProtonDB
-minspecaudio

* : forces lower quality audio, good for lower-end CPUs (removes some extra audio details, not reducing audio quality; reduces CPU load).

PCGamingWiki
-fullspecaudio

* : forces higher quality audio (default).

PCGamingWiki
gamemode

Proton/Wine compatibility option.

ProtonDB
-availablevidmem

Use -availablevidmem XXXX.0

PCGamingWiki