I just bought Outcast (I have played a pirated version before) and installed it with patch 3 on Win XP. When the game runs, it plays the intro, but when CD2 is required, it says it's the "wrong disk" (depends if I choose NOT US in the patch 3 installer) or "insert correct blabla" if I choose that it IS the US version.
The version I have has "Best of infogrames" and "complete version" on the box. It's English (not US I think).
If I install the game without the patch, everything works fine. But is the patch needed -- does it fix important bugs?