When you name your game "One Epic Game", you have one of two options: either fill your game with high-powered hardware, gnarly baddies, and over-the-top villains, or not take it seriously and call it ironic. Game developer Grip Games chose to do both. One Epic Game is a side-scroller set in a post-apocalyptic world filled with zombies that's aware of just how trite that premise is.
OEG has a very self-aware sense of humor that feels like it shouldn't be as funny as it is. The game literally begins with our hero asking a zombie why so many games have zombies in them.