Alien Swarm

Seconding this. During offline practice, it just shows you how to move and it's clearly not interested in holding your hand other than when you head to a door- 1 to weld, or "e" for only the technician; and other than that- it just showed you how to manually reload and change weapons. Not exactly a great tutorial, if you ask me. When I was playing online, I felt really clueless half the time.

This game seems really unpolished, also. It has no intro movie or no Valve intro screen and the beginning menu is extremely basic.

ValvE games are actually really generally unpolished compared to other games. Look at TF2 and L4D compared to, say, CoD.
Lousy tutorial, but I got the hang of it.

Is anyone else lagging while playing o.0 I lagged in the Offline mode. I dont even dare try to online mode since it seems likely to be worse.

My comput things.

Probably has something to do with Vista.