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