Even the Stream version doesn’t require Steam. You can just run the executable. A few folks over on Reddit claim they’ve given the game to their friends just by copying the files from an external drive.

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I mean if you want to invalidate my lived experience, sure. Played on release on a 5600X, RTX3070 and 32GB of RAM, 1080p, almost everything maxed out. Open areas on Koboh saw a drop to mid-40 fps, but other than that, I had one hard crash and no bugs I noticed.

This is what happens when Zura isn’t around to contain her!