Lukasz Nowicki is a Polish concept artist at Platige, a studio that has worked on games like Total War: Warhammer, Frostpunk, Dishonored and Halo 5.
The art you’re seeing here, though, is all from Retro Synthesis, a cyberpunk adventure game currently up on Kickstarter.
You can see more of Lukasz’s work at his ArtStation page.