Titan Legions is a part of Games Workshop's Epic Games System and is fully compatible with Space Marine and all it's supplements. Titan Legions and the Epic game system enable you to fight with vast armies on the tabletop.Titans are massive fighting machines as tall as skyscrapers. Each carries an arsenal of deadly weapons powered by the fury of its plasma reactor and is protected by energy shields and meters-thick armor. The ground trembles before these steel giants and whole cities are reduced to burning rubble by the earth shattering energies of their weapons. - BoardGameGeek