When you are on the street on some business, you do not suspect that at this very time something is happening under your feet deep underground. The Underneath game takes you to the catacombs deep underground. You will go there together with a small hero, but with a large pistol. The long, thick muzzle allows you to fire a bullet at great speed. The character will use the pistol not to protect himself, but to move through the tunnels. You need to shoot in the opposite direction from the direction of movement. The recoil of the shot will allow you to move and overcome obstacles in Underneath. The task is to get to the balloon.