Later on the levels have holes in the walls and portals through which aliens are entering the level, and you must seal these with dynamite (which you have to find first) to complete the level. Also on some levels there is no power and you have to find the power switch before the doors work, and sometimes you have to blow up generators to disable security laser beams that are blocking your path. So anyway, you have to clear each level of aliens using a variety of weapons whilst staying alive (not easy later on). It's a manic isometric shoot 'em up for PCs set in an alien infested military base and it's right up my street. It's clear that Alien Shooter, by Sigma-Team, has been influenced by many games but that's fine, because it was influenced by *great* games like: Gauntlet, Alien Breed, Diablo, Doom, Serious Sam etc.
