These guys are op cause they produce cementing paste and organic polymer.

(Btw they only spawn in swamps and redwood forests.)

How to tame one:

1. They only eat sweet vegetable cake before tame so if you have a chef station you can make the cakes.

2. Don't forget to bring Knock out items: tranq arrows, toxicant arrows, Tranquilizer darts or shocking Tranquilizer darts(don't recommend using wooden club cause they roll themselves into shells that are impossible to attack)

3. Once you have knocked it out put the vegetable cakes I it's inventory to tame and you should bring consumables that increase its torpor cause it a long tame (not so long but it's torpor goes down fast.

4. Now you have an Achatina! (They can't attack but they have good defense and produce goods.