Human versus alien in desperate battle. The Genestealers are a race of aliens who seek to conquer the Universe. They travel in huge, ancient, nearly derelict vessels commonly known as space Hulks, until they find a suitable planet to colonize. The Emperor of human space has recently become aware of the Stealers' activities and is taking immediate steps to isolate and stamp out the attack but at a terrible price of being ruthless to all tainted planets, wiping out whole populations in efforts to stop the spread. A more targeted approach is necessary, so great efforts are being made to search out the invading vessels to attack and destroy them before they have a chance to infect any more planets. Enter the Space Marines.
In Space Hulk, one player takes the role of the Space Marines, fanatical warriors dedicated to the destruction of the enemies of the Emperor. They are equipped with awesome weaponry and massive terminator armour. The other player takes the role of the Genestealers, fast, vicious and strong alien creatures.