Madden I, Yes both were designed to do so. There really is not a single player game in the style of Quake2 or HalfLife. Q3 has Capture the Flag and Deathmatch. UT comes with CTF, DM, Domination, and Assault. You can play against bots in either game. I'm not sure about Q3, but UT uses the TCP/IP protocol for Lan play.