Here is the full list of all 57 Unreal Tournament 3 achievements.
Defeat Akasha and complete the campaign in Insane.
Complete 1 mission in co-op.
Complete 10 missions in co-op.
Complete a campaign in co-op.
Get 200 kills in multiplayer on 50 different days.
Collect every power up on every map.
Complete Chapter 4 in Insane.
Complete Chapter 3 in Insane.
Complete Chapter 2 in Insane.
Complete 100 VCTF matches played to at least 3 captures.
Win 500 online matches.
Completed 100 CTF matches played to at least 3 captures.
Complete 100 Warfare matches played to at least 3 points.
Win a multiplayer match on every map.
Defeat Akasha and complete the campaign.
Complete Chapter 4.
Complete Chapter 3.
Get the "Top Gun" award in 20 matches.
20 successful retributions against a betrayer.
Get the "Big Game Hunter" award in 10 matches.
Complete a multiplayer match in every game type.
Get "Bullseye" (self-destruct to destroy an enemy) award in 20 matches.
Complete Chapter 2.
Kill 10 people with spidermines in deathmatch.
Kill an enemy with every vehicle (except hoverboard).
Achieve a Hat Trick in 10 CTF or VCTF matches.
Return 100 Orbs in Warfare matches.
Score 500 skulls in Greed.
Deliver 50 skulls in one score in Greed against adept or higher skilled bots.
Grab 200 points worth of betrayal pots.
Have over 20 minutes of "Invisibility Time".
Become a titan 20 times.
Become a Behemoth 10 times.
End sprees in 20 matches.
Complete 100 Deathmatch or Duel matches played to at least 20 kills.
Get the "First Blood" award in 40 matches.
Get the "Roadkill" award in 10 matches.
Get the "Shaft Master" award in 10 matches.
Get the "Combo King" award in 10 matches.
Get the "Blue Streak" award in 10 matches.
Get the "Biohazard" award in 10 matches.
Get the "Rocket Scientist" award in 10 matches and "Flak Master" award in 10 matches.
Get the "Monster Kill" award in 20 matches.
Get the "Gun Slinger" award in 10 matches.
Get the "JackHammer" award in 10 matches.
Get the "Head Hunter" award in 10 matches.
Get 100 kills with the Eradicator.
Have over 10 minutes of "Invulnerable Time".
Use the Slow Field power-up for over 10 minutes total.
Have over 20 minutes of "Berserk Time".
Have over 20 minutes of "UDamage Time".
Reach 20 kills against a god-like bot in instant action without dying.
Play a match with every mutator, using only 1 per match.
Get the "Killing Spree" award in 20 matches.
10 kills with every Titan weapon in one Titan transformation.
Complete Chapter 1.
Complete an Instant Action match in every game mode.