Here is the full list of all 78 Hexxon achievements.
Create and play test a level with the level editor
Complete level 0-0
Complete level 0-1
Complete level 0-2
Complete level 0-3
Complete level 0-4
Complete level 0-5
Complete level 0-6
Complete level 0-7
Complete level 0-8
Complete level 0-9
Complete all levels in world 0
Complete level 1-0
Complete level 1-1
Complete level 1-2
Complete level 1-3
Complete level 1-4
Complete level 1-5
Complete level 1-6
Complete level 1-7
Complete level 1-8
Complete level 1-9
Complete all levels in world 1
Complete level 2-0
Complete level 2-1
Complete level 2-2
Complete level 2-3
Complete level 2-4
Complete level 2-5
Complete level 2-6
Complete level 2-7
Complete level 2-8
Complete level 2-9
Complete all levels in world 2
Complete level 3-0
Complete level 3-1
Complete level 3-2
Complete level 3-3
Complete level 3-4
Complete level 3-5
Complete level 3-6
Complete level 3-7
Complete level 3-8
Complete level 3-9
Complete all levels in world 3
Complete level 4-0
Complete level 4-1
Complete level 4-2
Complete level 4-3
Complete level 4-4
Complete level 4-5
Complete level 4-6
Complete level 4-7
Complete level 4-8
Complete level 4-9
Complete all levels in world 4
Complete level 5-0
Complete level 5-1
Complete level 5-2
Complete level 5-3
Complete level 5-4
Complete level 5-5
Complete level 5-6
Complete level 5-7
Complete level 5-8
Complete level 5-9
Complete all levels in world 5
Complete level 6-0
Complete level 6-1
Complete level 6-2
Complete level 6-3
Complete level 6-4
Complete level 6-5
Complete level 6-6
Complete level 6-7
Complete level 6-8
Complete level 6-9
Complete all levels in world 6