An epic bug hunt featuring a unique blend of co-op play and squad-level tactics. With your friends, form a squad of four distinct IAF Marine classes. Plan your attack using an unlockable arsenal of weapons with countless loadout configurations against a wide variety of aliens. Blaze your way through an overrun, off-world colony, eradicating the alien infestation in environments ranging from the icy planet's surface, to a subterranean lava-flooded mining facility.
This is an official Jacob's Rest campaign but compiled with LDR lighting which gives much darker environment similar to the original Alien Swarm UT mod(2005). For now only 3 maps are included, these maps are shipped with Alien Swarm SDK: Landing Bay Deima Bridge Sewer Junction
How do you compile maps in LDR like that?