Good sight lines, and plenty of cover, but weapons will occasionally misfire due to erratic solar x-ray emissions. Recommended for the novice player.
Plenty of cover, and excellent stealth opportunity. Danger of backflash from laser-type weaponry. Moderate difficulty.
It's dark. Really dark! You won't see the enemy until he shoots. But he can't see you either, so it evens out. Not recommended for beginners. Eat your carrots.
Plenty of cover behind urinals and toilets. Extreme danger of ricochets off porcelain. Don't drink the water. Expert players only.
Extremely hazardous environment. Poisonous atmosphere requires use of breathing apparatus. Decapitating a civilian will cost you 5000 points. Have a nice day.