Humans (Crysis)

Humans in the Crysis Universe are embroiled in a war on Earth against The Ceph who are determined to eradicate them.

The war started in 2020 when the US Military was in a war against North Korea, and find an alien artifact. A soldier called Nomad decides to enter the alien structure. In there he also sees a possible invasion force consisting of many Ceph machines. Nomad manages to escape, but the structure creates a massive sphere of energy that freezes everything outside to -200°. Eventually a nuclear strike was ordered against the ice sphere. The explosion causes the ice sphere to expand and prompts a massive Ceph counterattack.

Humans wear nanosuits which provide superhuman capabilities, enabling them to switch between enhanced Armor, Strength, Speed and Cloak modes. Skilled soldiers were able to withstand the Ceph onslaught with this tech, in addition to nuclear weapons from military command.

Armor
Armor Mode diverts the energy supply of the Nanosuit into absorbing the kinetic energy of incoming projectiles and other damaging forces, such as hazardous levels of heat, radiation and energy blasts, making the user temporarily invulnerable to most forms of damage.

Strength
Strength Mode enhances the user's physical strength to superhuman levels. When activated, the CryFibril muscles tighten and inject a cocktail of performance-enhancing narcotics that are readily absorbed into the blood stream through the wearer's skin. This mode reduces Armor.

Speed
Speed Mode enhances the user's movement speed, allowing for a faster jogging speed or a super human sprint. When in this mode, the suit injects nanobots, which enter the wearer's bloodstream and hyper-accelerate the blood flow throughout the body, and supply more oxygen to the brain and muscle tissue. This mode reduces Armor.

Cloak
When Cloak Mode is activated, the nanosuit alters its outer surface through the use of a crystalline generation, capable of fully absorbing or bending incoming wave spectrums such as visible light, radio waves, infrared (thermal imaging), and possibly microwaves or others, to render itself completely invisible to the human eye and most surveillance equipment. This mode reduces Armor.