Intuitive Genius: Superhuman intuitive talent for inventing mechanical devices. His mutant ability functions as perception, as he possesses the ability to visually perceive "mechanical energy" (the kinetic energy and potential energy present in the components of mechanical systems) in action. This power allows Forge to instinctively know and understand the potential and functional operations of any machine or technological device in his visual range, a skill that combined with his natural intelligence allows him to conceive, design and build mechanical devices; and operate, modify and disassemble existing technology or create countermeasures for it.
Forge's superhuman talent does not mean that he is a greater inventor than geniuses such as Paul Matthews, Sebastian von Doom, or Alexander Burke, none of whom owe their talent for invention to mutation. But even a genius at invention must for the most part consciously work out the theoretical principles behind the invention and then the design of the invention itself through a series of logical steps.
In Forge's case, however, many of these logical steps would be worked out by his subconscious mind. Hence, Forge himself might not be entirely aware of exactly how he figured out how to create an invention of his, he often has to take apart his own inventions to see how they work.
Forge is mentally insane, barely holding onto his sanity by a thread.