Alien Breed 2.0
So Alien Swarm takes alot of its inspiration from the old Amiga game Alien Breed. It is a topdown dualstick shooter, but as the game currently has problems recognizing gamepads, you use WASD for movement, and the mouse for directional aiming.
The game comes with 1 campaign which you can take yourself through cooperatively with 3 fellow friends for a 4 player coop romp. You gain experience and level up after each finished map and unlock new equipment and weapons. Before each map starts you get to select your class: Officer, Special Weapons, Medic or Tech. They got different equipment and skills. The tech marine can hack doors or weld them shut. The medic can heal and so on.
Graphically the game looks pretty good on the source engine, but it still feels a little bland. I gotta give the guys credit though, the game is originally from 2004 before the move to the sourceengine as I recall. The music is horrible and the soundeffects are mildly satisfactory.
There are shiplogs spread out with some story being told, but truthfully I never read much of them, since you are fighting aliens pretty much nonstop, as you might have probably figured out by now. The spacebase settings works very well, and it really has that old Alien Breed meets Space Hulk feel to it.
All in all a very enjoyable game if you got 4 friends to play with, and best of all, its free.
So go get it!