IF I BUY THIS GAME OFF OF STEAM DOES IT ALLOW PLAYING OF THE SPY VS MERC 2V2 MULTIPLAYER MODE? or is it just the co-op?

sorry for the caps, but as soon as i found out this game was on steam i almost peed my pants in excitement at the thought that i might actually be able to play this game multiplayer again. the Spy vs Merc aspect of the splinter cell games (Pandora and SC:CT, f*ck double agent and f*ck conviction) is in my opinion possibly one of the best gaming dynamics ever created, and i have been sad for years ever since they removed it as a feature from the Xbox360(and previous to that, the xbox version)

please, someone, let me know if this game allows the 2v2 multiplayer mode that i have missed all these years

and: equally important:

IF IT DOES ALLOW IT, DOES ANYONE ACTUALLY STILL PLAY IT?

yea, this game rules. thanks!
-dann