Medic's Grenade is a special weapon available only in Wave Mode (Medic class).
It looks similar to the AI Grenade, with a white cross at the bottom. When throw, the grenade explodes on impact and create a smoke screen (Blue for teammates, green for enemies). The smoke will heal players and their teammates when they stay inside it as well as poisoning enemy players. It also acts like any other Smoke Grenade, blocking everyone's view until the smoke disappears.