Squids is a turn-based tactical RPG in which the player needs to stop an evil black ooze, threatening to destroy the oceans, over different levels. Before starting each level, a party of up to four squids, which can be leveled up or equipped with items, should be assembled. All of these fit in four character classes: stomper (melee fighter), shooter (ranged fighter), scout or healer. The squids are flicked across the battle field by a movement of the mouse or finger, and attack enemies by colliding with them. It is also possible to gather pearls, which can be used to buy aforementioned items. These pearls can be bought with real currency as well.