Not directly a game, but a set of APIs that can be used to port Windows games to Linux or to run them directly.

Polished turn based strategy game featuring fantasy characters and modular plots.

Aims to produce an immersive environment engine for high quality games. It is both a community and a game engine with game implementations already finished.

Fast-paced puzzle game where it's your job to clear the screen of gems before they squash you.

Commercial re-implementation of the Windows API for Linux with a focus on gaming. Similar to (and a derivative of) WINE.

Play-alike of Archon which was created by FreeFall Associates and distributed by EA.

Elite like space sim and game engine with modern rendering and capabilities.

New Breed Software's clone of the Williams arcade classic "Defender." Instead of humanoids, you rescue penguinoids.

Modern graphical rogue-like game. Currently in a release state, it is also under constant revision. Source available.

Free 3d city simulator written from scratch using OpenGL and SDL.