Impact Tactics (once called Smacktics) was a project that started in grad school, and has been languishing on the back burner for years now. The idea was to combine the decision making of a tactics game with the explosive kinetics of billiards. The result was something akin to a juiced-up football diagram with time dilation and nifty abilities.
The design drifted quite a bit from the original 1-page design document, and you can see how it progressed in the gallery below.