Vivendi Universal Games has sent out this press release, announcing that SWAT 4: The Stetchkov Syndicate is in development. Due out in the first quarter of 2006, The Stetchkov Syndicate adds 7 new singleplayer and multiplayer levels, 10 player (2 x 5 player teams) co-op support, new weapons & equipment, a new multiplayer mode and more. We have some screenshots here.