both the game (planeshift) and the engine (crystalspace) are open source projects. They will never be completed. That doesn\'t mean they aren\'t usable or worth less than other \"completed\" software.
If I recall it correctly Jorrit started with CS in 1995. After several years of work it has reached a stage now, where it is perfectly usable as you can see on planeshift. In a few months hopefully PS will also have reached a stage, where it can be called a mmorpg. It won\'t be finished then, either. Further improvements can always be made. Be it by adding more contence to it, to fix bugs or to modify it for recent hardware.
If you talk about completion: Not even commercial engines are ever complete. But these Produkts have a deadline, where they have to be finished. Oftenly they still include major bugs and glitches, that have to be fixed in patches long times after the product has been released. Many glitches only have workarounds in this software and are never really fixed.
So that these project are \"not even near completion\" in my eyes is a sign of quality of open source software and doesn\'t mean its worthless or pointless or something...