It was intended be an engine capable of running all the games in the Creatures series, allowing people to run them on unsupported operating systems and to extend the engine in ways impossible without access to the source code. Note, however, that openc2e is not a game by itself; it needs game content from elsewhere (either official Creatures games or community-created ones) to be playable. It is a project of the Creatures Community Development Network. You can visit their IRC channel (#ccdevnet on Freenode) if you would like to ask questions about the project.