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t's a remake of Tron: Deadly Discs for the classic Intellivision console. (Title make sense now?) It's also one of the few, if not the first, Tron freeware games that has nothing to do with light-cycles.

Basically, you run around in an arena fighting off bad guys with your disc. There are four different varieties of bad guy, and one of them has three different varieties of disc. More difficult enemies appear as your score increases, with the most difficult showing up if you can reach 1,000,000 points.

Bad guys enter through doors on the sides of the arena. You can jam these doors open by either hitting them with your disc, or by running into them. If you jam open doors that are opposite each other, you can run in one side and come out the other. This is very important to your survival.

If you jam enough doors, eventually a recognizer will be dispatched to fix them. If you can hit the recognizer when its eye is open, it will stop fixing the doors and leave the arena. Plus, you get lots of points for this.

You can take three hits before you die, and every hit makes you slower! You will eventually recover from damage, regaining your speed as well. Touching the recognizer kills you instantly, so don't do it.

Default controls are the familiar WASD to move, and the outer keys of numpad (1, 2, 3, 4, 6, 7, 8, 9, non-Mac users turn Num Lock on!) throw your disc in any of eight directions. If you press one of the throw keys while your disc is in flight, it will return to you. Discs are harmless when returning. If you move away from your disc as it is flying back, it will never catch up to you, you must stop and catch it. All of the controls can be changed from the main menu.

License: free

Additional System Requirements: GLX, OpenAL and ALUT.

InterLOGIC game is based on an old Amiga logic game Balls. This is a graphically enhanced release of our project from 1999, and now, five years after initial release, it is made available to public.The object of the game is to move differently colored balls through the maze, connecting it with the other same collored balls. Two or more connected same-colored balls will disappear, and you should clean the whole maze and finish the level. The balls are connected if they are in 90 degrees position to each other, in a row or a corner (cannot be connected diagonally).This release contains 30 mind-breaking levels for you to solve.

License: free

Additional System Requirements:

• SDL
• SDL_image

Interstate Outlaws (IO) is a vehicular death match based game created by mostly by college students from the United States, Great Britain, and Australia. It uses Crystal Space, CEL, and ODE. It is written in Python. Inspiration for this project came from old auto combat games the creators played when they were young. IO will be perpetually updated for an indefinite period of time. The software is free under the GPL license, but the developers respectfully request donations through the website to support current and future operations.

In the future, the developers are planning numerous new features. These include, but are not limited to: Sound; Pedestrian mode; More accurate physics modeling; More detailed vehicle models with functioning doors, hoods, and trunks; Storage for small arms and other items in the trunk of the vehicle; Much larger scale and detailed maps; Map Editor; Interchangeable power and drivetrains; Custom vehicle and pedestrian textures; Additional types of game play.

Features
• 5 unique vehicles with their own gear settings and weapon setups
• 2 different maps
• 6 weapons to be mounted
• Insanely cool damage model

License: free

Additional System Requirements:

The game runs on Crystal Space's celstart framework. A statically compiled version of celstart (compiled on ubuntu 7.04, linked against python 2.4 and glibc 2.3) is included with the game. If this doesn't work for you, there are two other specialised builds, one against glibc 2.5 and python 2.4, and the other glibc 2.5 and python 2.5.

In order to do this, you will need to install the devel packages of (or compile) SWIG, ODE, and python, and then compile crystal space and CEL, and make sure that your CRYSTAL and CEL environment variables point to those compiled directories.

Into Cerberon is a mod for Doom 3 that will bring the six-degrees-of-freedom action of the classic FPS game series Descent into the high-powered graphics engine of Doom 3.

License: free

Additional System Requirements: Requires retail Doom3 installed but not the expansion pack.

Intruder Alert is a free top-down 2D arcade maze game written in FreePascal using the SDL library for multimedia output. It's a hobby project and was inspired by 80's classics like wolfenstein 2d and alien breed. Basically it's several levels of old school, "find the key and the exit", maze madness. :)

If you want to make a trip down memory lane, back to when games didn't need a 1000 page manual to play, this might be your thing.

Enjoy it.

License: free

Additional System Requirements: libsdl, sdlmixer, libvorbis, (libsmpeg for framebuffer only version) and a proper accelerated x windows setup (including GL if it is used)

This fun and addictive game features realistic physics simulation, challenging gameplay, stunning visual effects, and multiple weapons, hidden bonuses, and more. Create massive destruction and rack up as many points as you can as you blast your way through 20 waves with thousands of aggressive space invaders.

License: free

Additional System Requirements: SDL, OpenGL