Shoot 'em up

Powermanga is an arcade 2D shoot-em-up game with 41 levels and more than 200 sprites. It runs in 320x200 or 640x400 pixels, with Window mode or full screen and support for 8, 15, 16, 24, and 32 bpp.

Freedroid RPG is an RPG with isometric graphics. In it, the player is Tux, who must fight rebelling robots in order to restore peace to humankind. To do so,Tux may take over robots in a minigame based off the classic game Paradroid, or may simply blast them to pieces with a weapon.

Defendguin is a clone of the arcade game "Defender," but with a Linux theme. Your mission is to defend little penguinoids from being captured and mutated.

Your world has been infested by an aggressive army of space critters. Overrun and unprepared, your government was unable to defend its precious resources. As a last effort to recapture some of the "goodies", you have been placed into a tiny spacecraft and sent after them.

ALIEN ARENA is a standalone 3D first person online deathmatch shooter
crafted from the original source code of Quake II and Quake III, released
by id Software under the GPL license. With features including 32 bit
graphics, new particle engine and effects, light blooms, reflective water,
hi resolution textures and skins, hi poly models, stain maps, ALIEN ARENA

Adanaxis is fast-moving first person shooter set in deep space, where the fundamentals of space itself are changed. By adding another dimension to space this game provides an environment with movement in four directions and six planes of rotation.

The goal of the game is to collect all the gold bullions found in each level and avoid crashing into any of the enemies. As you progress through the levels you will encounter harder enemies, and you can gain a short period of invincibility if you gather gold at high speeds.

A7Xpg is another gem among many by Kenta Cho.