Thousand Parsec (TP) is a free and open source project with the goal of creating a framework for turn-based space empire building games.
Thousand Parsec is a framework for creating a specific group of games, which are often called 4X games, from the main phases of gameplay that arise: eXplore, eXpand, eXploit and eXterminate. Some examples of games from which Thousand Parsec draws ideas are Reach for the Stars, Stars!, VGA Planets, Master of Orion and Galactic Civilizations.
Unlike commercial alternatives, it is designed for long games supporting universes as large as the player's computer can handle. It allows a high degree of player customization, and features a flexible technology system, where new technologies may be introduced mid-game.