The classic customisation returns in full effect in Armored Core 4. Every element of the game is designed to offer players the highest possible level of customisation when designing and building their mechs. With just a few simple and intuitive steps, players can augment their creations with serious weaponry, external armour and internal hardware and then fine tune and tweak each unit for best performance. The possibilities are almost infinite! Players are able to test drive their creations in a series of trials and then, when ready for battle, challenge other mechs in order to advance through the exciting tournaments and leagues.