The Outer Rim by charmedy.deviantart.com on @DeviantArt
Warframe Prime Series, Kevin Glint on ArtStation at https://www.artstation.com/artwork/k23Ld
pixiv is an illustration community service where you can post and enjoy creative work. A large variety of work is uploaded, and user-organized contests are frequently held as well.
Pharah Mercy on ArtStation at http://fiship.artstation.com/projects/PZaGn
Warframe - Frost
Succubus Mercy, LRY CiteMER on ArtStation at https://www.artstation.com/artwork/3eGNm