There are 30 Trophies that can be collected.

Bronze

Wiper    
Successfully cheat once.

Bottom Feeder    
Win a round entirely from the prone position.

Sharpshooter    
Get three or more eliminations in a single round with a 25% hit percentage or higher.    

Bromance    
Win a split-screen round without either player being eliminated.     

One Hit Wonder    
Win a round with 3 or more eliminations using a marker without having to reload in a 5-on-5 or larger match.

Olympian    
Dive or slide 100 times.

Go Ballistic    
Eliminate an opponent you can't see by arcing your paintballs.    

Spy    
Shoot an opponent in the back from their own side of the field.     

Cross Training    
Win a Speedball and a Woodsball tournament.

Team Captain    
Win a round after issuing field commands to at least three teammates.

Billboard    
Win an event while using the jersey, pants and marker from the same manufacturer.

Foam Cowboy    
Win a round while wearing the 'Rodeo King' mask.

Silver

Paint Monger    
Shoot 10,000 paintballs.    

Unbreakable    
Win a round without losing a teammate in a 5-on-5 or bigger match-up.

Lone Wolf    
Win a 7-on-7 or higher non-reinsertion game where you eliminate all opponents.

Demolitionist    
Eliminate three or more opponents with a single grenade.

Pump Assassin    
Using a pump-gun, eliminate three or more opponents in a round without missing.

Goggler    
Eliminate three opponents by shooting them in the goggles in a single round.

Speedball Champion    
Complete all of the Speedball events.     

Master Woodsman    
Complete all of the Woodsball events.    

Jack of All Trades    
Complete all of the Recball events.

E'Ventual Evaporation    
Eliminate three opponents in a single round with a completely fogged mask.     

Tactical Overkill    
Hit the opposing flag carrier with a rocket.

Gold

Lucky Clip    
Eliminate an entire enemy team using a single pistol clip in a non-reinsertion game.

Connoisseur    
Unlock and then purchase all of the equipment in the game.    

Mr. Popular    
Play games with teammates from 50 real teams.

Paintball Legend    
Complete all of the Speedball, Woodsball, and Recball events.    

Greatest Paintballer in the World    
Complete all of the Speedball, Woodsball, and Recball events on Hard difficulty.

Lawlessness    
Successfully cheat five times in a row in the same round.

Platinum

Platinum    
Earn all other Trophies.

http://www.ps3trophies.org/game/greg-hastings-paintball-2/trophies/