I used to love that game! I got hooked on the 1 level demo it gave me. I liked most everything about it, but years later as I got older and my gaming tastes got more refined, I found serious flaws with C7.
Still, I loved the enemies (Ttocs rule! I called them T.he T.erminators O.f C.orrior S.even when I was a little kid). Most of the enemies are names spelled backwards!
Ttocs - Scott
Solrac - Carlos
Semaj - James
Tenaj - Janet
Eniram - Marine
Lots of cool low-end (Rodex), mid-end (Ttocs) and high-end enemies (Tymok and Mechanoid Warrior).
I kinda miss the mid 90s and that DooM clone frenzy age....