yeah UT's got some cheats too, I don't remember the exact terms (someone fills me in on this) but they were of the likes of "god", "ghost", "weaponsloaded", etc...
Honestly, I am a 2d video game veteran, so I don't find myself enjoying these first person perspective games as much as the younger generation. For me, beating games like "The Adventures of Bayou Billy" on the NES, or "Salamander" on the MSX (life force), or "Aldynes" (Supergrafx), or even "Alex Kidd in Miracle World" on the Sega Master System, were more memorable and enjoyable in those days. I know, it's nostalgic...