Here is the full list of all 40 Obliteracy achievements.
Win one multiplayer match.
Win five multiplayer matches.
Win fifteen multiplayer matches.
Successfully log in to Obliteracy.com.
Win ten single player matches.
Win twenty-five single player matches.
Lose one single player match.
Defeat the Codexicron once.
Defeat the Codexicron twice.
Deal 1,000,000 damage across all single player games.
Deal 5,000,000 damage across all single player games.
Deal 1,000,000,000 damage across all single player games.
Win a single player match with full health.
Win a single player match with only one health point left.
Deal over 10,000 damage in one shot in a single player match.
Deal over 25,000 damage in one shot in a single player match.
Deal over 50,000 damage in one shot in a single player match.
Deal exactly 1,000 damage in one shot in a single player match.
Deal exactly 10,000 damage in one shot in a single player match.
Use an 11-character word in a single player match.
Use a 12-character word in a single player match.
Use a 13-character word in a single player match.
Use a 14-character word in a single player match.
Use a 15-character word in a single player match.
Use a 16-character word in a single player match.
Use a 17-character word in a single player match.
Use an 18-character word in a single player match.
Use a 19-character word in a single player match.
Use a 20-character word in a single player match.
Spell 'PROSODY' in a single player match.
Use the same word twice in a single player match.
Perform the 'Anaphora' achievement four times.
Perform the 'Anaphora' achievement forty times.
Use the same word 4x in a single player match.
Use the same word 8x in a single player match.
Win five Quick Matches.
Win twenty Quick Matches.
Win fifty Quick Matches.
Earn a 150% Quick Match Challenge Level.
Earn a 200% Quick Match Challenge Level.