BIO FREAKS

Alter View  During gameplay, press and hold < and press Start. (Thanks to LWargalla@t-online.de)

Dirty Fighting Pause the game, disable shields, resume the game, and press and hold A while attacking. (Thanks to LWargalla@t-online.de)

One Hit Fatalities (Thanks to Big 813@aol.com)
MinaTek: Headspit Forward-Away-LP+LK (close)
ZipperHead: Buzzcut: Forward-Away-Away+RK (close once opponents arms are gone)
Ssapo: Headevour: Forward-Away-Away+RP+RK (close)
PsyClown: Cut in half: Forward-Away-Away+LP+LK (close)
Sabotage: Decapiblast: Forward-Away-Away+RP (1-3 steps away once opponents arms are gone)
BullzEye: Backhandecap: Forward-Away-Away+RP (close)
Delta: TorsoShears: Forward-Away-Away+LK (close)
Purge: Mutilator: Away-Forward-Forward+RP+RK

Taunt  During gameplay, press <C and >C. (Thanks to Scarfy007@aol.com)