Here is the full list of all 41 Contra: Operation Galuga achievements.
Complete Stage 7 in Story Mode.
Complete Stage 5 in Story Mode.
Complete Stage 6 in Story Mode.
Complete Stage 4 in Story Mode.
Complete Stage 3 in Story Mode.
Complete Stage 2 in Story Mode.
Purchase something from the Perk Shop.
Defeat the Mutant Lieutenant in Arcade Mode Stage 2 without dying.
Defeat the Super Wall in Arcade Mode Stage 1 without dying.
Defeat any boss in Arcade Mode without taking damage.
Complete Stage 1 in Story Mode.
Score enough points to earn an Extra Life.
Overload a special weapon.
Stack a weapon to Level 2.
Overload each weapon type at least once.
Overload all weapons at least once.
Complete Arcade Mode.
Complete Arcade Mode without Perks equipped.
Complete Arcade Mode in 1-Hit Kill mode.
Complete Stage 8 in Story Mode.
Discover Bradley's fate...
Defeat Gromaides in Arcade Mode Stage 3 without dying.
Defeat the Alien Heart in Arcade Mode Stage 4 without dying.
Defeat the Devil Worm in Arcade Mode Stage 5 without dying.
Defeat Big Fuzz in Arcade Mode Stage 6 without dying.
Defeat Kimkoh in Arcade Mode Stage 7 without dying.
Defeat Dragon God Java in Arcade Mode Stage 8 without dying.
Purchase an Alternate Soundtrack from the Perk Shop.
Purchase a Player Character from the Perk Shop.
Purchase everything from the Perk Shop.
Earn 350,000 points in a single playthrough.
Earn 40,000 Contra Coins overall.
Complete the game faster than 59:59.
Complete a Challenge in Challenge Mode.
Complete 10 Challenges in Challenge Mode.
Complete 20 Challenges in Challenge Mode.
Steal a life from another player in Multiplayer.
Have a life stolen in Multiplayer.
Defeat 10,000 enemies total.
Defeat 20,000 enemies total.
Input the Konami Code. You know the drill.