Here is the full list of all 48 Coffee Crisis achievements.
Defeat 25 aliens
Complete stage 3
Defeat bouncers in stage 3
Complete mini-game
Complete stage 2
Defeat Big Blue Alien boss in stage 8
Beat a boss with max health
Earn an extra life from high score
Defeat 25 enemies
Complete stage 1
Complete game with Ashley
Complete game with Nick
Complete game in co-op mode
Complete stage 4
Complete stage 5/defeat Skinny Chestknee
Complete stage 6
Complete stage 7
Complete stage 8
Complete stage 9/defeat Darth B.
Complete stage 10/defeat Overlord
Defeat robot boss in stage 6
Earn 700 energy points in minigame
Destroy one of each type of breakable object
Lose 25 lives
Complete the game thrice
Activate a level password
Activate a cheat code
Collect 25 lives
Collect 25 invincibility powerups
Collect 25 extra attack powerups
Achievement awarded to achievers who achieve all of the achievements
Complete game on Metal difficulty
Complete game on Death Metal difficulty
Complete Death Metal difficulty under 30 minutes
Complete Death Metal difficulty under 45 minutes