Here is the full list of all 44 Giant Life achievements.
Level 1 completed - Level 2 Unlocked!
Level 2 completed - Level 3 Unlocked!
Level 3 completed - Level 4 Unlocked!
Level 4 completed - Level 5 Unlocked!
Level 5 completed - Level 6 Unlocked!
Level 6 completed - Level 7 Unlocked!
Level 7 completed - Level 8 Unlocked!
Level 8 completed - Level 9 Unlocked!
Level 9 completed - Level 10 Unlocked!
Level 10 completed - Level 11 Unlocked!
Level 11 completed - Level 12 Unlocked!
Level 12 completed - Level 13 Unlocked!
Level 13 completed - Level 14 Unlocked!
Level 14 completed - Level 15 Unlocked!
Level 15 completed - Level 16 Unlocked!
Level 16 completed - Level 17 Unlocked!
Level 17 completed - Level 18 Unlocked!
Level 18 completed - Level 19 Unlocked!
Level 19 completed - Level 20 Unlocked!
Level 20 completed - Level 21 Unlocked!
Level 21 completed - Level 22 Unlocked!
Level 22 completed - Level 23 Unlocked!
Level 1 - Completed with 3 Stars!
Level 2 - Completed with 3 Stars!
Level 3 - Completed with 3 Stars!
Level 4 - Completed with 3 Stars!
Level 5 - Completed with 3 Stars!
Level 6 - Completed with 3 Stars!
Level 7 - Completed with 3 Stars!
Level 8 - Completed with 3 Stars!
Level 9 - Completed with 3 Stars!
Level 10 - Completed with 3 Stars!
Level 11 - Completed with 3 Stars!
Level 12 - Completed with 3 Stars!
Level 13 - Completed with 3 Stars!
Level 14 - Completed with 3 Stars!
Level 15 - Completed with 3 Stars!
Level 16 - Completed with 3 Stars!
Level 17 - Completed with 3 Stars!
Level 18 - Completed with 3 Stars!
Level 19 - Completed with 3 Stars!
Level 20 - Completed with 3 Stars!
Level 21 - Completed with 3 Stars!
Level 22 - Completed with 3 Stars!