Jump in your hovercraft and fly into the face of danger in TUNNEL B1. It's your terrifying duty to sortie deep underground into hostile enemy-held territory and destroy an insane madman before he can destroy all of mankind. Through numerous fast and furious missions you'll fight powerful drones, tanks, helicopters, and more while unlocking secrets and uncovering ship-boosting power-ups. You'll need to utilize all the deadly firepower at your disposal in order to achieve your vital goals in TUNNEL B1.