None, I dont use retarded units like ft.

Gunrox is a free game, that you play online: http://www.gunrox.com/?ref=Late Its a lot like jagged alliance or ufo/xcom series, but you only play against human opponents, and your soldiers are always the same even if they die and you can improve their abilities every time you gain a level. With real money you can buy some handy stuff like more storage space but using real money is not required to compete against others and doing well.