Unreal Tournament III

The “JackHammer" award is earned for getting 15 kills with the Impact Hammer in a single match.

Suggested Setup
Gametype: Deathmatch
Map: Morbias Arena
Mutators: Speed Freak, Weapon Replacement (Rocket Launcher/Enforcer to Impact Hammer)

This requires basically the same strategy as the other weapon award trophies, though may take a little longer. Always be holding to be charging your Impact Hammer, and once it is fully charged run directly into an enemy to get a one hit kill that blows them into gooey bits. Try to always have a full charge when you hit an enemy, as not having a full charge will basically just push them away from you and cause them to lose health.