Unreal Tournament/Deathmatch

Oblivion
Shock rifle on the bridge, flak cannon on the aft section, and rocket launcher on the lower deck.
 * 1 Opponent: Blake

This is an easy match: there is one opponent. He doesn't have much of a preference between the three weapons, but understands how to use them, even by firing them at the wall beside you.

As always, try to get hold of the rocket launcher first - if you can trick Blake into following you, it can inflict the most damage with least worry.

Stalwart

 * 2 Opponents: Calameth, Kryss

A three room arena:
 * The first room contains an armor on a crate (requiring a hammer jump), and a flak cannon behind a crate in the corner.
 * The second room, overlooking the car, has a pulse gun in plain sight, a rocket launcher on a few crates next to the pulse gun (requiring a hammer jump), and a Big Keg O' Health inside a crate (which must be shot to open). The AI near the crate will usually shoot it right away.
 * Between these two rooms is a shock rifle.
 * The third room is more of an open space, that contains a few health packs and thigh pads.

The two weapons for "suppressing fire" are close by - usually you can grab the flak cannon and shock rifle in one pass, allowing you to either steal kills from an on-going battle between the two opponents, or when they are otherwise distracted.

Fractal
Rocket launchers and health at the top, and Shock rifles at the bottom. A shield belt is in the central floor, although you can shoot the yellow buttons surrounding the pit to open a trapdoor. The trapdoor drops into an instant-kill trap (which is dodgeable only through luck).
 * 1 Opponent: Luthienne

The AI opponent falls to an easy trick, even on Godlike difficulty. If she sees you head up the lift, she will try to follow. You can take advantage of this by firing a powerful attack into the upper portion of the lift such as spread rockets or a combo attack.

Turbine

 * 4 Opponents: Slain, Annaka, Cali, Lexington


 * Weapons:
 * GES Bio rifle on the upper floor in the corner. Can be reached just by jumping.
 * Shock rifle in the lower water tunnel.
 * Pulse gun on the upper floor, near the lift near the stairwell
 * Ripper near the metallic walls, across from the lower water tunnels.
 * Minigun up the ramp from the pulse gun.
 * Flak cannon in the upper water tunnel.
 * Rocket launcher on the upper floor, near the lift and bridge.
 * Sniper rifle in the alcove near the damage amplifier
 * Shield belt near the ripper: shoot the metal wall between the ripper and it's ammo.
 * Damage amplifier near the flak cannon. Requires hammer jumping.
 * Invisibility an the alcove above the minigun area. Requires hammer jumping.

Your best chance is to claim the damage amplifier in order to get a few kills with the nearby flak cannon.