Here is the full list of all 48 Unreal Tournament 3 trophies - there are 36 bronze, 8 silver, 3 gold and 1 platinum.
Collect all other trophies.
Get 200 kills in multiplayer on 50 different days.
Collect every power up on every map.
Get the "Combo King" award in 10 matches.
Complete 100 VCTF matches played to at least 3 captures.
Win 500 online matches.
Get the "Top Gun" award in 20 matches.
Get "Bullseye" (self-destruct to destroy an enemy) award in 20 matches.
Get the "Big Game Hunter" award in 10 matches.
Complete 100 Warfare matches played to at least 3 points.
Complete 100 CTF matches played to at least 3 captures.
Complete 100 Deathmatch or Duel matches played to at least 20 kills.
Complete a campaign in co-op.
Defeat Akasha and complete the campaign in Insane.
Defeat Akasha and complete the campaign.
Complete Chapter 4 in Insane
Complete Chapter 4.
Win a multiplayer match on every map.
Return 100 Orbs in Warfare matches.
Complete Chapter 3 in Insane
Complete Chapter 3.
Get the "First Blood" award in 40 matches.
Have over 20 minutes of "Invisibility Time".
Have over 10 minutes of "Invulnerable Time".
Get the "Monster Kill" award in 20 matches.
Have over 20 minutes of "Berserk Time".
Have over 20 minutes of "UDamage Time".
Achieve a Hat Trick in 10 CTF or VCTF matches.
Kill an enemy with every vehicle (except hoverboard).
Get the "Head Hunter" award in 10 matches.
Get the "JackHammer" award in 10 matches.
Get the "Shaft Master" award in 10 matches.
Get the "Blue Streak" award in 10 matches.
Get the "Biohazard" award in 10 matches.
Get the "Gun Slinger" award in 10 matches.
Get the "Rocket Scientist" award in 10 matches and "Flak Master" award in 10 matches.
End sprees in 20 matches.
Play a match with every mutator, using only 1 per match.
Complete a multiplayer match in every game type.
Complete Chapter 2 in Insane
Complete Chapter 2.
Get the "Roadkill" award in 10 matches.
Complete an Instant Action match in every game mode.
Get the "Killing Spree" award in 20 matches.
Reach 20 kills against a god-like bot in instant action without dying.
Complete 10 missions in co-op.
Complete 1 mission in co-op.
Complete Chapter 1.