GTA IV Remastered on Steam Deck OLED – FusionFix 4.0.4 Makes It AMAZING!

GTA IV finally feels like a remaster!
Thanks to FusionFix v4.0.4 by ThirteenAG, Liberty City runs smoother, looks sharper, and controls perfectly on the Steam Deck OLED.

In this video, I test how this “fan-made remaster” performs with the latest patch, showing real gameplay, stability, and visual improvements.

💾 Download FusionFix (v4.0.4):
https://github.com/ThirteenAG/GTAIV.EFLC.FusionFix/releases/tag/v4.0.4

⚙️ Test Setup:

Steam Deck OLED (latest SteamOS)

GTA IV: The Complete Edition (Steam)

Proton GE10-25

🔥 What’s fixed:

Better controller support & prompts

Camera, mouse & input fixes

Borderless windowed mode

Improved lighting and shadows

Smoother FPS and frame pacin

💬 It’s not an official remaster — but it might as well be. Watch and decide for yourself.

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