Here is the full list of all 32 Venture Kid achievements.
Defeat Teklov part II without collecting all the treasures.
Reach a boss room without defeating any enemies.
Defeat one of every type of enemy.
Buy 5 different items in the shop.
Clear the game in under 45 minutes.
Clear the game on hard
Reach a boss room without taking damage.
Clear the game on normal.
Deal the final hit on Teklov using the shield.
Use the bottle to refill a weapon.
Beat the final level of the game.
Die 30 times.
Beat the eight level of the game.
Find all the secret treasures.
Beat the seventh level of the game.
Buy something in the shop.
Use A special item to walk on spikes.
Beat the sixth level of the game.
Break 100 blocks.
Beat the fifth level of the game.
Jump from a frozen enemy.
Jump over 15 spiders.
Defeat 200 enemies.
Beat the fourth level of the game.
Make an enemy defeat another enemy.
Defeat the boss without losing energy.
Beat the third level of the game.
Beat the second level of the game.
Use the boomerang to collect an item.
Defeat a boss with only one heart left.
Defeat a boss in under 30 seconds.
Beat the first level of the game.