The next mainline Metro game may be a ways off still. In 2010, 4A Games released a brand new survival horror FPS known as Metro 2033. The game would go on to be a profitable success for publisher THQ and result in a couple of sequels, largely thanks to its unique premise and possibly scratching an itch for fans of games set in the post-apocalypse as Fallout was taking its sweet time to release new entries. As the series progressed, it became better and better with each game as the graphical fidelity improved, the story got richer, and the gameplay got more immersive and deeper. It has now been five years since the last Metro game and while it has been confirmed there will be another one, we have no idea when it's coming.