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Tenebrae is a modification of the Quake source that adds stencil shadows and per pixel lights to quake. Stencil shadows allow for realistic shadow effects on every object in the game world. Per pixel lighting allows you to have fine surface details correctly lit. These are essentially the same algorithms as used by the new Doom game.

License: free

Additional System Requirements:

TEG, (a Risk clone) is a networked multiplayer turn-based strategy game. The goal is to conquer all the countries of the world. The rules are very similar to Risk's ones, with some differences. It has a server, a robot and a gnome client. Support for GGZ Gaming Zone and IPv6.

License: free

Additional System Requirements: GNOME, libxml

tenmado is a vertically scrolling, late 1990s style (that is, a massive number of enemy shots against a smaller-than-it-looks spaceship) shoot 'em up game. A very accurate collision detection makes it a game of dexterity. If something looks like a triangle, it is a triangle, not a rectangle of similar size.

However, surviving is only 20% of the game. The main feature of tenmado is the "color chain bonus". You can get a very big score (about 100 times bigger than a normal enemy-destruction point) by destroying enemies of the same color successively. It is easy or difficult depending on how greedy you are.

License: free

Additional System Requirements:

Tennix! is a SDL port of a simple two-player tennis game. It features simple image loading (with all game graphics being customizable by simply editing them with a graphics editor like The GIMP), sound effects, stadium audience sounds, and ball shadows.

License: free

Additional System Requirements: SDL
SDL_mixer
SDL_image

Terminus takes place across our Solar System 200 years in the future. Space colonization has just begun and both Earth and Mars enjoy unprecedented prosperity. Then, it happens! Ancient alien technology is discovered which allows instantaneous travel among far-flung destinations, and the course of human history is changed forever. Players fly, trade, shoot, or steal their way through a single or multiplayer campaign bumping into hundreds of independently-acting characters and ships controlled by Artificial Intelligence (AI), and interact with 19 fully-equipped and schematically accurate space stations.

License: commercial ($9.99 - $29.95 (TPE is a free upgrade))

Additional System Requirements: Required: Linux kernel 2.2.0 or greater, XFree 4.x, glibc 2.1 or later, pthread library 0.8 or later, P2-300 or greater, at least 64 megs of RAM, Glide or OpenGL/DRI compatible video card, 4x or faster CD-ROM Recommended: Sound card, joystick, TCP/IP network connection (for multiplayer only)

TerraGear is a collection of open-source tools and rendering libraries which can transform publically available GIS data in 3d representations (i.e. 3d models or 3d maps) of the earth for use in real time rendering projects. Terragear can import 3d data sets such as DEM terrain grids, 2d polygon data sets such as coastlines, city outlines, lake outlines, and 2d raster data sets such as the 1km NAOO land use/land cover data. It also has tools for generating realistic airports, runways, and lighting based on available FAA data.

TerraGear's main terrain building tool has support for being parallelized across a cluster of workstations greatly speeding the overall world building process.

TerraGear is the primary tool used to generate the world wide scenery for the FlightGear project.

License: free