Here is the full list of all 135 Marcus Level achievements.
Kill 500 skeleton pirates
Kill 500 parrots
Kill 500 jackal soldiers
Kill 500 zombie snails
Kill 500 cowboys
Kill 500 bats
Kill 500 sharks
Kill 500 ghosts
Kill 500 honey bees
Kill 250 skeleton pirates
Collect 5 000 chocobongos in world 4
Earn 25 badges in world 4
Improve level time 3
Get killed 100 times by a monster
Kill 500 robot skeletons
Kill 250 honey bees
Collect 2 500 chocobongos in world 4
Kill 250 robot skeletons
Earn 20 badges in world 4
Collect 1 000 chocobongos in world 4
Earn 10 badges in world 4
Beat 4 Boss
Find 12 secrets in world 4
Collect 500 chocobongos in world 4
Find 9 secrets in world 4
Find 6 secrets in world 4
Kill 50 honey bees
Collect 5 000 chocobongos in world 3
Earn 25 badges in world 3
Kill 250 parrots
Improve level magnet 3
Kill 250 ghosts
Collect 2 500 chocobongos in world 3
Kill 250 jackal soldiers
Transform 20 times to a cloud
Buy 50 secret bonus
Buy 50 time bonus
Kill 250 bats
Kill 250 cowboys
Kill 250 zombie snails
Buy 50 life bonus
Kill 250 sharks
Earn 5 badges in world 4
Kill 50 robot skeletons
Buy 25 secret bonus
Find 3 secrets in world 4
Earn 20 badges in world 3
Buy 50 magnet bonus
Get killed 50 times by a monster
Collect 5 000 chocobongos in world 2
Improve level life 3
Kill 50 ghosts
Collect 1 000 chocobongos in world 3
Find 12 secrets in world 3
Earn 10 badges in world 3
Find 9 secrets in world 3
Collect 500 chocobongos in world 3
Buy 25 life bonus
Buy 10 secret bonus
Collect 5 000 chocobongos in world 1
Transform 20 times to a frog
Kill 50 jackal soldiers
Transform 20 times to a monkey
Buy 1 secret bonus
Collect 2 500 chocobongos in world 2
Earn 25 badges in world 2
Buy 25 time bonus
Buy 25 magnet bonus
Buy 10 life bonus
Kill 10 honey bees
Kill 10 robot skeletons
Improve level secrets 2
Earn 20 badges in world 2
Kill 50 cowboys
Find 12 secrets in world 2
Earn 25 badges in world 1
Transform 10 times to a cloud
Kill 50 skeleton pirates
Earn 20 badges in world 1
Earn 5 badges in world 3
Beat 3 Boss
Kill 10 ghosts
Find 6 secrets in world 3
Transform 5 times to a cloud
Improve level life 2
Get killed 25 times by a monster
Transform 10 times to a monkey
Buy 10 time bonus
Find 3 secrets in world 3
Kill 10 jackal soldiers
Beat 2 Boss
Find 9 secrets in world 2
Transform 10 times to a frog
Kill 50 bats
Earn 10 badges in world 2
Buy 10 magnet bonus
Find 6 secrets in world 2
Improve level time 2
Collect 1 000 chocobongos in world 2
Kill 10 cowboys
Transform 5 times to a monkey
Transform 1 time to a monkey
Collect 500 chocobongos in world 2
Buy 1 life bonus
Earn 5 badges in world 2
Kill 50 zombie snails
Find 3 secrets in world 2
Kill 10 bats
Kill 10 zombie snails
Kill 50 parrots
Collect 2 500 chocobongos in world 1
Find 12 secrets in world 1
Transform 1 time to a cloud
Buy 1 time bonus
Improve level secrets 1
Improve level life 1
Get killed 5 times by a monster
Find 9 secrets in world 1
Kill 50 sharks
Kill 10 parrots
Improve level magnet 2
Earn 10 badges in world 1
Beat 1 Boss
Collect 1 000 chocobongos in world 1
Transform 5 times to a frog
Kill 10 skeleton pirates
Improve level time 1
Find 6 secrets in world 1
Kill 10 sharks
Transform 1 time to a frog
Improve level magnet 1
Earn 5 badges in world 1
Collect 500 chocobongos in world 1
Find 3 secrets in world 1
Buy 1 magnet bonus