A PC port would have required rewriting core engine components (the game ran on a modified version of Volition’s in-house RenderWare engine). By the time THQ considered a PC release, Saints Row 2 was already in development, and resources were shifted.
If you are looking for Saints Row games that actually have native PC versions, you can find them on official stores: Saints Row 1 Pc Download Highly Compressed REPACK
Set apply_patches = true to allow for 60 FPS mods and resolution scaling. Performance and Expectations A PC port would have required rewriting core
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