Here is the full list of all 51 Giana Sisters 2D achievements.
Finish the classic levels.
Get rid of 1,000 monsters.
Collect 10,000 diamonds.
Get rid of 500 monsters.
End the 6th island.
End the 4th island
End the 5th island
Wipe out a killer eye.
Use the soda bottle.
Get rid of three opponents by jumping without touching the ground between jumps.
End the 3rd island.
End the 2nd island.
Bring down a boss.
Use the chewing gum.
Bring down a killer bee.
Collect 5,000 diamonds.
Destroy 1,000 stone blocks.
Defeat 200 monsters.
Collect 1,000 diamonds.
Get rid of 50 monsters.
End the first island.
Bring down a killer owl.
Get rid of a bee.
Survive the first level
Collect 100 diamonds.
Unlock a bonus level.
Transform yourself into the Punk Giana.
Get rid of an opponent with a shot.
Get rid of an opponent with one jump.
Get rid of two opponents by jumping without touching the ground between jumps.
Destroy 50 stone blocks.
Get rid of one owl.
Flatten a beetle.
Get rid of a jellyfish
Wipe out an eye.
Collect 50,000 diamonds.
Collect 100,000 diamonds.
Collect 1,000,000 diamonds.
Activate all bonus levels.
Get rid of 10,000 monsters.
End the 7th island
End the 8th island.
End the 9th island.
Play the game completely.
Complete the game without a game over.
Jump in the air 5,000 times.
Get rid of 10 opponents by jumping without touching the ground between jumps.
Destroy 5,000 stone blocks
Destroy 10,000 stone blocks.
Destroy 100,000 stone blocks.
Get rid of every monster at least once.