From a surface level, it seems like the difficulty is the main factor that makes the game good, but in reality, the difficulty is just a game mechanic that supplements other game mechanics. (gamedesignjunkie.com)
Reminds me of a cross between Fallout and Rage with a little Far Cry and other game mechanics mixed in as well. (blog.us.playstation.com)
«The developers were able to distill a lot of the MOBA genre's fun and merge it with other game mechanics quite successfully.» (indiegames.com)