Here is the full list of all 25 Charlie's Adventure achievements.
Complete all levels with 3 medals.
Finish the game on any difficulty.
Kill 200 Zombies.
Collect a total of 500 stars.
Get the medic zombie to heal you for 100 total health.
Slam the ground and hit a zombie 100 times.
Kill 75 Zombies.
Hit the crazy zombie with the bombs with a bullet.
Make the zombie that charges you hit a wall.
Collect a total of 100 stars.
Collect all stars on any level.
Finish first level.
Dash trough zombie 10 times.
Slam the ground and hit a zombie 10 times.
Get 10 zombies to be squished by the Stone Trap.
Kill 10 Zombies.
Collect a total of 10 stars.
Finish the game on medium difficulty.
Finish the game on hard difficulty.
Dash trough zombie 100 times.
Get 10 zombies killed by the fire.
Get 10 zombies killed by the Saw Trap.
Get 10 zombies killed by the Arrow Machine.
Get 10 zombies to die by a Cannon.
Get 10 zombies to die by an Axe.