Time Travel!
Finally, someone who tries it out properly - a multiplayer RTS game of all things!
Looks amazing,
watch the videos.
If you don't "get it", there is a timeline - you can go back a few minutes in time, to either command units in the past (to say, prepare for defence in the future) or send units back to a past point in time - to fight with themselves in battle
With the way they have "time waves" - ie; a point where everything updates itself according to what has happened in the past, it stops those annoying paradoxes and problems. Every player also has a limited amount of commands they can do in the past - go further back, it costs more, meaning you can't play a game where basically you go further and further back in time doing more and more elaborate counter-counters
Will be one of the most interesting RTS games I think I'll be playing next year, if it comes out. I hope they get published