hmm, let's see...
P.O.V, awesome design, nice ending (matrix-ish part r0x0rz ur b0x0rz)
Poke646, even more awesome design, ending leaves u guessing.
Azure Sheep. An action love story. 'Nuff said.
SvenCoop - nice levels ,it's like SP but it's not...
TFC - nothing as good as blowing the crap out of someone with a chaingun or a sentry turret
Natural Selection - The new combat mode kix ass
Scientist SlaughterHouse - I'm a 1337 Scientist killer, guilty as harged and PROUD OF IT.