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