Celtreos

One or two players, supporting mouse/keyboard or 1-2 game controllers.

“Celtreos” is like the space shooters of decades past: tiny ship, big weapons, waves of foes, power-ups and obstacles.

Gameplay is enhanced by sound effects, voice, and over 15 different songs (30 minutes of music!). You can even play your own music and auto-next-song for key game events.

There are several stages, playable in any order, each ending with a challenging boss. Wall layouts and spawn patterns are partially randomized so you never know quite what to expect.

Choose from a variety of ships, and create your arsenal from a huge selection of weapons! The game plays very differently based on your choices: obstacles are harder to clear with larger ships, and weapons may travel only in certain directions or have other special features.

You can play in a window or in Full Screen, and you can control how much of the display is used in Full Screen mode.  You can also set graphics quality to one of three levels.