Unreal Tournament III

This trophy is awarded for collecting every power-up on “every” map, and I say that because not all maps are required for this trophy. It is the same 40 that are required that you finish matches on for the Around the World trophy, though you don’t actually have to finish a full match to have collecting all the powerups count for the trophy. The only powerups you need to collect are: health vials, all armor variations, and all powerup variations. Weapon pickups (and powerups spawned from destroyed Dark Walkers) aren’t required for this trophy. Simply run through every level in Instant Action if you wish with the Speed Freak mutator on and collect everything. Once the message pops up on the bottom of your screen that you have collected all powerups you can return to the main menu and move on to the next level. I would recommend waiting out all powerup timers while doing this, as this can contribute quite a bit to the powerup time trophies, lessening your grind time later.

Like the Back of My Hand All Powerups Walkthrough (True Achievements)

The above linked guide from True Achievements is very well put together, and if followed should help you finish all the levels without much trouble. See below for notes on two levels that I found I had issues with.

Note that if you have the “Map Pack” downloaded like is suggested, you don’t need to find the powerups on the maps Morbius, Facing Worlds, or Searchlight.

Notes for specific maps:

Rising Sun - 10 health vials on the beam in the middle. You have to time your jump with one of the elevators on the sides of the building to be able to reach the top beam. This may take a bit of practice, and may be easier if you turn Speed Freak off.

Coret - 6 Health vials. From the alcove with the rocket launcher head through the door on the opposite side of the room so that you walk past the room with the stripper poles on your right. Continue through and in the hallway with the ramp there will be three vials on either side of the corridor in indentation in the wall. The other 6 are in the same location on the mirror side of the map.