File: Alien.shooter.expansions.v1.2.zip ... -

Scientists attempt to bio-engineer "mutant dinosaurs" and "acid bats" to fight the original invaders, but the experiment predictably backfires. This expansion adds:

Set six months after the original game, players return to the laboratory to deploy a virus meant to wipe out the remaining alien hordes. It features five new levels of high-intensity combat. File: Alien.Shooter.Expansions.v1.2.zip ...

The "v1.2" or "Complete" version often found in digital stores like or GOG includes several quality-of-life updates to the classic engine: Alien Shooter + Expansions - GOG SUPPORT CENTER File: Alien.Shooter.Expansions.v1.2.zip ...

with diverse locations like playgrounds and residential areas. New enemy types and a major boss battle. File: Alien.Shooter.Expansions.v1.2.zip ...