Epic Video Game Mashup Brings Together Samus, Master Chief, Shepard, and Many More!

How does one even put in words how epically awesome this art is?! 

LoneFireWarrior on Deviant has created these fantastic pieces of art that brings together some of our favorite video game characters. You have Samus Aran from Metroid, Master Chief from Halo, Gordon Freeman from Half-Life, Optimus Prime from the Cybertron games, Commander Shepard from Mass Effect and so many more! 

It makes one wonder, why don't gaming companies make more mashup games? Fans would surely love it, just look at how well the Super Smash Bros. franchise has done over the years.

Who is your favorite character shown here, and who do you think needs to be added?