Titan Complex is telling a story of a world populated by anthro furries. Space travel and advances in biology, DNA manipulation and tech changed moral and behaviour. Massive muscle growth, hyper, size difference, weight transfer, inflation and weight gain -- if those topics resonates in you, you will enjoy your stay.
Titans are genetically improved furries, enchanced both biogenetically and genetically to overcome limitations of biology. They could be overmuscled giant, enormously fat or hyper endowed. Some of them could grow to a size of a planet and beyond.
Behemoths are bio-engineered overmuscled furries capable of gaining gargantuan amounts of fat. Their basic augmentations includes multiple stomaches and port in the bellybutton for hose. That hose is used to pump them full of fattening food.
Pilot are regular-sized furries, whose neural network can be connected to the MECHs or spaceships. They enter the trance-like state and operate those machines as it were their own body.