Here is the full list of all 33 Goo Saga - there are HD Edition achievements.
Smash 20 Barkys.
Collect 5 crystals.
Destroy 100 enemies.
Smash 30 Lil Stompers.
Defeat Loyal Guard Boss.
Collect your first crystal.
Destroy 250 enemies.
Destroy 500 enemies.
Collect 15 crystals.
Collect all crystals.
Unlock the bad ending.
Complete Goo's journey and liberate him.
Defeat Megalosaurus Boss.
Defeat Mantodeus Boss.
Defeat The Professor.
Smash and open 100 boxes.
Defeat all bosses without getting hit.
Smash 12 blob pods and collect the blobs inside.
Find 15 hidden rooms and unlock the mysteries inside.
Activate 30 checkpoints.
Smash 20 Exapods.
Smash 40 O-Copters.
Smash 20 Muzzlefrogs.
Complete 3 levels in normal mode by collection 100% of the blobs.
Complete 6 levels in normal mode by collecting 100% of the blobs.
Complete 10 levels in normal mode by collecting 100% of the blobs.
Complete 3 levels in survival mode without any hit losses.
Complete 6 levels in survival mode without any hit losses.
Complete 10 levels in survival mode without any hit losses.
Complete 3 levels in time-trial mode with at least 10 seconds remaining.
Complete 6 levels in time-trial mode with at least 10 seconds remaining.
Complete 10 levels in time-trial mode with at least 10 seconds remaining.
Unlock all skins.