To describe Injustice Gods Among Us as an all action fighting game would be an understatement. The level of violence and the manner of delivering it is so over the top it verges on slapstick and is all the better for it. The cast of characters in the game read like a whos who of DC Comic heros with Batman, Superman, Lex Luthor, Green Arrow, Luchador Bane, The Flash, Nightwing, Deathstroke, Catwoman, Aquaman, Wonder Woman, Solomon Grundy, Cyborg, The Joker and Harley Quinn all playing their part which usually means fighting every other member of the cast using their own special immensely exaggerated abilities.
The action takes place in various on earth and above earth locations and moving between them is usually achieved by battering your way through walls and other obstacles or, better still, punching or throwing another character through them.
Scattered around these locations or battlefields are various objects which give extra powers to each character and the quality and quantity of these added powers depend on the character finding the power enhancing object.
In amongst this fighting chaos there is some sort of story. After Lois Lane, carrying Superman's unborn child, is blown up in nothing less than a nuclear explosion, Superman takes it upon himself to build a new and more just world. However, Batman, who is the on screen persona of the player, has other ideas and forms alliances with some of the other characters to frustrate Superman's plans. So not too strong on plot but moving from one outrageously epic battle to the next provides sufficient fun for the story to be pretty much irrelevant.
The cartoon like graphics are purpose built and suit that purpose well. The characters appear much as you have seen them before from other games or comics, but if you have not seen them before they are probably well enough conceived for the viewer to guess their names from a list of those available. The voice acting and incidental sounds are not very realistic, but given the characters and the nature of the action perhaps realistic is an inappropriate term to use and the cover all 'well suited' may be better.
Although the game does not take itself too seriously it is certainly seriously good fun.