Here is the full list of all 14 Adventure Apes and the Mayan Mystery achievements.
Defeated Skull Demon
Jump ability acquired
Sawgun acquired
Raygun acquired
Bombs acquired
Swim ability acquired
Laser beam acquired
Pulsar acquired
Ghost Vision Acquired
Push ability acquired
Defeated Arachnomax
Defeated Squidephant
Defeated Magmatoro
Defeated Horatio Hawk, wow!