The United States Colonial Marines. Ultimate troubleshooters equipped with state-of-the-art firepower, capable of power projection across the vast expanse of deep space. They can sharpshoot a man at a thousand meters or obliterate an entire world from the safety of orbit. They reckon they are unbeatable.

But on a dirtball colony planet known only as LV-426 the unthinkable happens. 

The Marines lose. 

The Aliens - Colonial Marines Technical Manual is your official guide to the equipment and organisation of the United States Colonial Marine Corps. Packed with diagrams, technical schematics and plans, the manual takes a detailed look at the guns, vehicles and ships of the USCMC, and the men and women who use them.