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