XorCurses is a game based entirely on Xor by Astral Software. The original game was released around 1987 for the 8-bit home computers popular at the time. XorCurses attempts to faithfully recreate that game for Linux, but slightly ironically, uses ASCII characters instead of pixel based graphics (which even the 8-bit computers could manage). The idea of Xor is to roam around a series of mazes collecting masks. The first level is simply a matter of finding your way around, but the second level introduces fish and chickens which block your path or kill you if they hit you. From there on in, things get progressively tougher and really is a challenging and difficult puzzle game.
Chroma is an abstract puzzle game in which a variety of colorful shapes are arranged in a series of increasingly complex patterns, forming fiendish traps that must be disarmed and mysterious puzzles that must be manipulated in order to give up their subtle secrets. Initially, it is so straightforward that anyone can pick it up and begin to play, yet it gradually becomes difficult enough to tax even the brightest of minds. It features twenty-one levels, ranging from beginner to expert; infinite undo and redo capability, as well as replaying of solutions; a choice of smooth graphics or a minimal, text based version; and a level editor to allow you to design your own puzzles.
Octaspire Crates! is a scriptable, skinnable, extensible, and relocatable 3D action puzzle game. All the missions, game entities (or crates), game states, and configuration of the game engine are implemented as plain text Lua-scripts. So, if you know Lua, you can write new game entities, game states, missions, and levels with any text editor, without any special development tools. New skins can be created with any image editor that can save .png images, dropped into a new subdirectory under the resources/textures directory, and changed in the configuration file config.lua. Crates has also its own (simple) implementations for all the different container classes it needs (like vector, string, and so on) to keep the external dependencies fewer.