Here is the full list of all 27 Clid The Snail achievements.
Complete the level "Slug Swamp".
Complete the level "Silver Mountains".
Complete the level "Shashan Desert".
Complete the level "Broken Sea Islands".
Complete the level "Valley of Marad".
Finish off Haelsy on the balcony of Alastor's headquarters.
Finish off Atxaka at the entrance of Alastor's headquarters.
Reconcile with Morti in the lounge at Alastor's headquarters.
Defeat Itako in single combat in the dojo at Alastor's headquarters.
Finish off Cassius at the top of Alastor's headquarters.
Finish off Ska in the grasshopper citadel.
Find all the Ralar seeds and top up your health.
Buy all the shells from Atxaka's store.
Get all the weapons in Clid's arsenal.
Buy all the medkit upgrades in Atxaka's store.
Blow a slug to pieces for the first time.
Finish off the lair at the end of the "Silver Mountains".
Defend the rabbit citadel from siege.
Find Torkol's brother in the crypt of the "Shashan Desert".
Finish off the colossal worm in the "Slug Swamp".
Finish off the ogre slug in the coliseum of the "Shashan Desert".
Get tricked by Cassius.
Pet the ToMM-1 turret.
Borrow the jewel from the ring in the "Slug Swamp".
Complete "Clid the Snail.
Find the origin of the plague in the "Valley of Marad" and finish it off.
Get all the trophies.