Counter Strike Source

[Gwarsbane]

a gernade in reality can take a house out :/

It can do alot of damage to a house, but it can't actually take out a house.

A fragmentation grenade (what most grenades are that are used) should be able to kill a person in game if thrown close enough to them.

A flashbang should also be able to hurt someone, after all not only does it produce a big bang and some smoke, but it also fires out little rubber balls (least the one group of them that I know of do) that are ment to stun someone. Thats why when kids are involved, unless things are really really bad they will never toss on into the room where they know kids are cause it could kill a child.