Worms 2: Armageddon

As stated in the description, this trophy requires you to end Mission 11 by using the Holy Hand Grenade. When you use it, it must kill the last enemy worm on the map in order for it to count. The easiest way to achieve this is to eliminate all enemy worms except one, by using a combination of the Bazooka, Homing Missile, Super Sheep, and Airstrike. Finish off the final one with the Holy Hand Grenade.

The best way to approach this would be to use the Bazooka and Homing Missile to clear the worms at the top of the Fort. The Super Sheep and Airstrike are particularly useful in clearing out the worms at the far end of the Fort, who are harder to reach with standard weapons. When you get down to the last enemy worm, the Poison Strike is a fantastic way of slowly whittling down his health without actually killing him. Once poisoned, a worm will lose 5HP every turn until he reaches just 1. It's not totally necessary to wait this long, however, you can if you want to be sure that the Holy Hand Grenade will kill him.

When there's only one enemy worm remaining, use your Jet Pack to fly over to his position and place a Holy Hand Grenade directly next to him. Don't power it up, just press to instantly drop it (think of it as a form of Dynamite.) Don't worry about your worm taking damage, as you should have other worms alive to compensate for any loss that may occur here. Providing that the Holy Hand Grenade kills this last worm, you will obtain this trophy at the end of the mission.