ExcaliBug is a mix between the Commandos saga and an RPG. The first aspect of the game is its unusual scenario: it is in the world of insects. The player takes command of them four, all with different classes, for example, fighter or wizard. The objective in the 15 missions is to perform tasks, such as the search for a lump of sugar.

As in other tactical games, player characters die easily. The consequence of this is the need to proceed stealthily and in a planned manner. Classes have different skills that are necessary to advance the game. With each mission resolved or enemy killed the insects get experience points that are used to advance their levels. Except for the magician (who gets new spells) this has no other effect than improving combat ability.