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