After re-evaluating the performance and costs of maintaining Titans as a main battle vehicle, GDI engineers designed a new tank to supplement the walker and later replace it after the Second Tiberium War. Expensive to maintain, with complex and often vulnerable legs, the Titan could also not be transported by GDI's new Ox aircraft. Hence the 65 ton Predator, which resembles a conventional battle tank, currently forms the backbone of GDI armoured corps (comparable in weight to many modern day real-world 'western' style MBT designs).