Some of their functions are missing, and I made sprite for only one so far. That's why they all share the sprite (for now), but with different colors.

Default (yellow) - A grenade that explodes after some time.

Mini (green) - 3 grenades that explode on contact with enemy or after some time. Deals 1/3 of default grenade's damage.

Giga (blue) - Explodes after a long amount of time, deals massive damage. Long cooldown.