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