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 bottom-up scrolling levels with a rotund, and nicely polished in copper, spaceship. Note that the Amiga version offers horizontal and vertical scrolling action missing on the PC version. 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 but cannot compare to the Amiga version (even when running on VGA mode) especially in terms of animations and scrolling. Note that the game was developed to run on 8086 and 8088 Intel CPU-based PCs! The MS-DOS version supports CGA (4 color), EGA (16 color) and VGA graphics modes. Unlike the Amiga version, it only supports the vertical scrolling levels here. The graphics are good, even in CGA mode although some detail is missing when compared to the EGA and VGA modes. 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 and found only on the VGA mode i.e. in level 2 (bottom-up scrolling gameplay) the sand on the desert terrain is animated, resembling a sand storm! The EGA and VGA graphics here also offer a bounding effect of the screen when gameplay starts.
Sound is good, offering some nice in-game tunes along with several shooting and explosions SFX.