Welcome back!

Any particular reason you opted for a new account?
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I've downloaded a unofficial ATX mod that allows you to run Trespasser on high end pc, which got me back into Trespasser, but its missing the prime features that the original ATX has offered (jumping raptors, console command cheats, quick save. etc). Is there an updated version that has those features along with the high end compatibility?
I'm not sure if the unofficial ATX mod you speak of is Trespasser CE (Custom Edition) or something we here are otherwise unaware of. Where exactly did you download this mod?
If that is the case, then CE implemented most of those features differently, some of which can still be activated by editing the Trespasser.ini file that comes included with the CE package - the documentation on this file is included in the package as well, which should tell you how to enable console command cheats and quick save, amongst other new things. Jumping Raptors, unfortunately, have not been re-implemented quite yet, at least not in such an obvious fashion as in ATX.
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I'm also wondering if there is a Trespasser Twilight software out there that also is compatable with high end pcs?
Well, Twilight should work fine on a modern Windows machine, you can even edit its INI file to play in 1920x1080 resolution if you want. There is also a method for porting Twilight into CE, which really just consists of moving the folder into a TresCD/mods/Twilight folder, editing the FM.ini file, and then changing a line in the tp_mod.ini file. All of this is documented in the CE package as well.