I've played the demo-versions of CM:BO/AK/BB.
Had alot of fun with them, especially with CM:BO because you could build awesome fortifications with those concrete and wooden bunkers.

I always strategicly placed mortars and artillery/AT canons in front or behind the bunkers and the hidden men to make sure no Allied soldier (I usually played Axis) got away.
Currently I'm playing CM:SF (blasphemy!

) and I'm waiting for it's expansion ''Marines''.