Warframe is a free MMOTPS (Massively Multiplayer Online Third-person Shooter) developed by Digital Extremes, players are able to play as their respective 'Warframe' that they are able to choose and play as according to their unique abilities.
Now you may note the noblemen skin has a new helmet and a syandana.
The Stalker skin has a different helmet and syandana as well.
And the latest skin is the High-Tech noblemen. Inspired by the PS4 Excalibur skin.