0 A.D. is a free, open-source, cross-platform real-time strategy game.
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.
Decimation is an open-source multiplayer game framework programmed in Java. It can support a variety of 3D games, ranging from small four-person games to large massively multiplayer online role-playing games, supporting thousands of concurrent users.
It's a browser based space mmorpg game called Pulsar Online. It was launched in mid 2011. Game is playable, functional, although it lacks some planned and required features like port raiding, better UI, more RPG and so on. All PHP developers are welcome to develop new functions and fix old bugs.