Unreal Tournament III

The "Blue Streak" award is earned for getting 15 kills with the Stinger Minigun in a single match.

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

With the minigun it is easiest to camp one of the corners in the rooms with the elevator. Stand on the same wall as on the elevator on either side (I preferred the left) so that you are facing toward the door out of the arena. There are two spawn points in front of you in either corner beside the door. Use the secondary fire on the minigun to take out the enemies as they spawn in. You should easily be able to make the 20 kills without being killed yourself.