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