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