The open-source Game and Graphics Engine for multiplayer, cross-platform, real-time 3D Action, The Ca3D-Engine is an all-purpose, modern 3D graphics engine and game development kit.

The main features include
1. High-quality, real-time 3D graphics with a very strong and flexible material system,
2. Cross-platform and cross-compiler portability,
3. Very fast built-in network code for multi-player internet and LAN games,
4. Dynamic per-pixel lighting and shadows, combined with physically correct Radiosity,
5. Very large terrain rendering, skeleton based model rendering,
6. 3D sound effects with a strong sound system,
7. Uses the strong Lua language for map scripting, entity scripting and GUI scripting,
8. Freely available under the GPL or a custom license that is tailored to you needs.

Quick Start
1. Installation is reduced to unzipping the downloaded file.
2. Double-clicking on Cafu.exe starts the program.
3. In the software main menu click on New Game, then select a map in the following screen and click Go! to start the game.
4. The ESC key opens the main menu again, where you can change game options or quit the game. The F1 key opens the in-game console.

The license of this software is Free Trial Software, the price is $325.00, you can free download and get a free trial.