Tubular Worlds was a fairly popular shareware side-scrolling shooter, featuring a veriety of weapons and enemies in 4 different settings (episodes).

Oxyd magnum! Gold contains an extra 20 levels not originally published with Oxyd magnum!

The third entry in the Oxyd series is also the first to be released on a purely commercial basis. Like its predecessors, it is a real-time puzzle game where the player maneuvers a rolling ball through a series of landscapes. Each landscape contains a number of "oxyd stones", which reveal colored symbols when hit, if the next stone you strike …

You control a black orb that is trapped in a puzzle like labyrinth. A level is called a landscape and there are 200 landscapes to solve. The main gameplay element consists of opening the so-called oxydstones. You can bump against a oxydstone and a colored symbol will appear. Uncover two of the same colors and they will stay open, making …

Oxyd 2 is the successor of Oxyd, taking the basic gameplay of this game and extending it with new features. The goal in Oxyd 2 is to open all the ?Oxyd" stones. These stones reveal symbols if touched and of each symbol there are two stones containing it. Opening the pair of stones of a symbol without touching another stone, …

The gameplay is very simple: you control a small black ball with your mouse, you have to bounce it against blocks which display a symbol. Now you have to find the matching symbol. The game can be seen as a mixture of Marble Madness and good old Memory. The levels get more and more complex later. The 2007 Windows release …

With classic cosmic ship under your command you have two usual objectives to fulfill - destroy everything and try to survive. There are 4 similar levels further split into two parts. Second part is always harder because the end of it is occupied by huge/powerful boss. You start the mission with a few lives in stock and two problems: the …