Combat the Korts and free the lost settlers on an alien planet that resembles Mars. You fly through various stages from i.e. spooky cavers to sandy dinosaur graveyards and lava dribbling volcanoes, in either horizontal (Amiga only) or bottom-up scrolling levels with a rotund, and nicely polished in copper, spaceship. Aliens attack in waves and in random (!) formations swirling around in front of you! Formations are not common and predictability is low which makes it a constant and difficult challenge. Shooting down a attacking formation will leave you a bonus weapon pod. Shooting this pod will cycle through various bonuses such as speedup, and firepower add ons like multiple shots, homing missiles, side shots etc. Gameplay switches from horizontal to vertical when progressing to levels (i.e. level one is side-scrolling whilst level two is bottom-up scrolling). At the end of each level there is always a level boss waiting for you to ...shoot down...
Gameplay can switches from side-scrolling to bottom-up perspective which is rather impressive for a shoot em up. Nasties are moving way too fast and always towards you spitting firepower at the same time. More on that they appear fast from random edges of the screen, so there is no safe place to hide on screen, which makes it difficult enough to avoid from hitting either on them or their bullets. And you only have five lives... (no energy bar here). A very difficult shooter that is.
Graphics are colorful and very well detailed. Although there is no parallax scrolling, still backgrounds and sprites are very well designed and give a pretty good impression. Sprites are big and polished, and move smooth on screen without any frame-rate slowdowns. It is quite impressive the color-cycling effects being used in some levels i.e. in level 2 (bottom-up scrolling gameplay) the sand on the desert terrain is animated, resembling a sand storm! Note that there are some impressive static pictures in HAM mode (4096 colors) between stages loading too.
Sound is good, offering some nice in-game tunes along with several shooting and explosions SFX.