0 A.D. (pronounced "zero ey-dee") is a cross-platform real-time strategy (RTS) game of ancient warfare. It's a historically-based war/economy game that allows players to relive or rewrite the history of ancient civilizations, each depicted at their peak of economic growth and military prowess.
2x2 (Two by Two) is a multiplication puzzle game. Your goal is to solve a multiplication puzzle in which all digits are replaced by letters. To achieve the best score, you should solve the puzzle with a minimal number of errors and in minimal time. 2x2 is easy to learn, but hard to master. It is simple, smart, and addicting. It will allow you to test and improve your math skills, calculation skills, logic, and even knowledge of probability theory. With a large number of possible combinations, no two games will be the same.
Andrew's Game aims to be a lightweight and highly expandable code base editable by anyone with a basic understanding of Python. The project has three parts: core systems, sample game, and reusable extensions. Core systems deal with the actual game mechanics; a sample game will be a template of how to use core systems and reusable extensions to create a working game. The reusable extensions can contain items and minor added functionality. Andrew's Game can implement a text-only single player RPG, which is like a MUD without support for multiple players.
Arx Libertatis is a cross-platform, open source port of Arx Fatalis, a 2002 first-person role-playing game developed by Arkane Studios. Arx Fatalis features crafting, melee and ranged combat, and a unique casting system where the player draws runes in real time to effect the desired spell. The Arx Libertatis source code is based on the publicly released Arx Fatalis sources. This does however not include the game data, so you need to obtain a copy of the original Arx Fatalis or its demo.
Bitfighter is a game that feels a little like Asteroids on steroids. It's a multiplayer space-based combat and strategy game, featuring customized ships, multiple game modes, cool retro graphics, and smooth network play. It also includes a full featured level editor, Lua scriptable bots, and other cool features. It has a very active development team, so the game keeps improving.
Blood Makes the Grass Grow Green (BMTG3) is a multi-player, side-scrolling, 1-dimensional strategy game that pits two people against each other in a duel over a stretch of land. Each player is positioned in a bunker at opposite ends of the map and tasked with deploying the right personnel and vehicles to capture FOBs (forward operating bases) and overrun your enemy's bunker. Currently there are 5 different units available. Timing, unit selection, and basic strategy are all necessary for success.
Brain Party is a fun, family-friendly puzzle game that's made up of 36 mini-games designed to push your brain to its limits by testing memory, logic, mathematics, reaction time, and more. It is split into two modes: test mode gives you five mini-games in a row and adds up your brain weight to see how smart you are, and practice mode lets you play your favorite mini-games as often as you want. If you do well enough, there are six extra mini-games that can be unlocked, as well as a new game mode designed to keep you playing and enjoying your favorite games even longer.