Alien Bash II

Alien Bash II is a top-down shooter similar to The Chaos Engine (in
contrast to the predecessor which is more like Alien Breed). After a planet
was attacked by aliens and enslaved their inhabitants, the player takes the
role of an escaped prisoner who tries clean up the mess.

While moving through the maze-like environments, the player shoots a lot of
aliens and has to solve a few basic puzzles (usually switch puzzles or finding
keys) in order to open up the way to proceed. Some of those are optional and
open up bonus areas with power-ups (e.g. additional life-energy or extra
weapons like grenades) and money. The latter can be also earned by killing
enemies and is used between levels to buy the mentioned extras in a shop. The
goal of each of the eight levels is to first free all hostages (a radar shows
the general way) and then kill the end boss who always the same with different
attacks. There are three control options to choose from which determine how
the player character behaves while shooting, e.g. it allows to shoot while
moving or while spinning on the spot.