(Red Alert 3) Natasha's special ability to shoot people out of vehicles, its possible to take out a Shogun Executioner with that ability.
(Fallout 3) All my ability's to achive more and better critical hits and base power (especially when stealthed) i did the math, and if i use a full Shisishkebab, when stealthed i do about over 200-300 damage, it kills a super mutant master in one, and on top of that, i still carry on stealthed.
(Endwars) My infantry's ability for quick insert into enemy lines...That and the fact my infantry people are mean bastards who take down tanks at regular intervals XD.
(in order of importance)