A program for creating and playing console-based text adventures that are intended for a competitive environment (such as The Game, Puzzle Hunts, etc.

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Developer: cranea
License: BSD License
Operating System: OS Portable (Source code to work with many OS platforms)

Powerfull and easy to use web based CMS.

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Developer: CMSR
License: GNU General Public License (GPL)
Operating System: OS Independent (Written in an interpreted language)

Groundfire is based on an old Sega Saturn game; 'Death Tank' which was bundled free as a hidden bonus game with the Saturn version of Duke Nukem 3D.

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Developer: groundfire.net
License: GNU General Public License (GPL)
Operating System: Windows and Linux.

Its turn based, web-browser, fantasy MMORPG written in PHP and MySQL (but may work with many other databases) with Smarty Template Engine, ADOdb and PHP Mailer.

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Developer: vallheru
License: GNU General Public License (GPL)
Operating System: 32-bit MS Windows (NT/2000/XP), All POSIX (Linux/BSD/UNIX-like OSes), OS Independent (Written in an interpreted language)

BALLOONS is a tile based platform puzzle game written in C++ using SDL.

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Developer: balloons-ng
License: GNU General Public License (GPL)
Operating System: All 32-bit MS Windows (95/98/NT/2000/XP), All POSIX (Linux/BSD/UNIX-like OSes)

Beam Blocks is a tile-based, turn-based, deterministic puzzle game.

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Developer: beamblocks
License: GNU General Public License (GPL)
Operating System: OS Independent (Written in an interpreted language)

CSameGame is a multiplatform Java game based on SameGame.

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Developer: csamegame
License: GNU General Public License (GPL)
Operating System: All 32-bit MS Windows (95/98/NT/2000/XP), All POSIX (Linux/BSD/UNIX-like OSes), OS Independent (Written in an interpreted language)