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