🥇 Perfect Win
Beat the game without continuing.
🥈 Fourth Boss
Beat the fourth boss.
🥈 Online Warrior
Beat 10 opponents in online versus mode.
🥈 High Score
Score 800,000 points in one game -- with Game Settings set to Hardcore.
🥈 Hard Win
Beat the game without using a special attack.
🥉 Pipe Wielder
Wield the pipe in single-player or co-op mode.
🥉 Knife Wielder
Wield the knife in single player or co-op mode.
🥉 Psycho
Kill 10 enemies without losing your weapon.
🥉 Perfect Boss
Beat the first boss without dying.
🥉 First Versus
Beat another player in an online versus match.
🥉 Online Co-op
Complete an online co-op game.
🥉 Kill Jet
Defeat Boss 'Jet' at the end of Stage 2 -- with Game Settings set to Hardcore.