cool physics-y games?

[Tudoreleu]

garry's mod
build destructible buildings and drive through them
build tanks with acf
forget around with wiremod

algodoo?

literally mentioned in the op, you guys

[Ad Bot]

[gebenuwell]

if you like exploding stuff you should get detonate
http://www.wildebeestgames.com/detonate.htm
it has a demo