Unreal Tournament III

This trophy is the longest grind in the game, but thankfully you don’t really need to do this over 50 days. Once you have the 200 kills on a day you can switch the date forward on your PS3 to the next day and it will still count as a new day.

Suggested Setup
Gametype: Deathmatch
Map: Morbias Arena (Free Map Pack DLC)
Force Respawn: On
Mutators: Speed Freak, Titan (Titan Pack DLC)

Set match to 100 kills, after the first match hit to quickly launch the next match.

It is highly recommended that you use the Morbius Arena map from the free dlc for this trophy, as it makes this grind much faster. This map is in the shape of a large circle with two hallways off to the side opposite each other with elevators at the back of them. The map as a whole is extremely small, which it very easy to get many kills with the melee attack while in Titan form. At the start of the match you are going to stand in one of the rooms with the elevators in the same manner as suggested for the Shard-O-Matic trophy. Grab the spawned rocket launcher then just kill enemies as they spawn until you are shown that you can press to go into Titan mode.

Once you are in the first stage of Titan mode, run back and forth between the two elevator rooms and take out enemies with your rocket launcher. Once you are shown you can press again, move to the very center of the room then press it to increase in size again. In this second Titan form you are extremely large, and have a countdown until you explode and die. What you want to do is continually press to use a melee attack, in which you pound the ground causing a large area attack the takes out anyone in it's area that doesn't have a spawn shield on. Continue doing this until you explode, at which time you will take out more enemies. Get back over to one of the elevator rooms again and kill enemies until you can go into Titan mode again. Each 100 kill match should only take about 3 minutes to finish, so this method is the fastest overall for grind the 50 days.

Thank you to luckyegg for the Titan mutator method.