In a era of 3D games becoming the norm, Metal Slug (1996) showed the world how impressive 2D games still could be.
Metal Slug is one of my favourite videogame series especially due to the gorgeous animated sprites and backgrounds.
I suggest looking over this video to understand what I am talking about:
I decided to create 2 tributes images.
This one is called Roady Trip (Yes, it is mispelled on purpose)
This one is called Safe Fly (Background photo taken over Norway by me)