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