Here is the full list of all 35 Frido achievements.
Complete level 1 with no deaths
Complete level 3 with no deaths
Complete level 4 with no deaths
Collect all stars in level 5
Complete level 10
Complete level 10 with no deaths
Complete all levels in Desert
Complete all levels
Collect all stars in level 10
Complete level 9
Complete level 9 with no deaths
Collect all stars in level 9
Complete level 8
Complete level 8 with no deaths
Complete all levels in Village
Collect all stars in level 8
Complete level 7
Complete level 7 with no deaths
Collect all stars in level 7
Complete level 6
Complete level 6 with no deaths
Collect all stars in level 6
Complete level 5
Complete level 5 with no deaths
Complete level 4
Complete all levels in Castle
Collect all stars in level 4
Complete level 3
Collect all stars in level 3
Complete level 2
Complete level 2 with no deaths
Collect all stars in level 2
Complete level 1
Collect all stars in level 1
Die by the arrow