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