Xbox Live Game with Gold subscribers will be getting four free games for Xbox One and Xbox 360 in May 2015. Generally, the free games list is updated on the 29^th of every month. Games added to the May lineup include CastleStorm: Definitive Edition, Mafia II, and F1 2013. As a bonus, Microsoft is extending the deadline for Pool Nation on Xbox One.

In the sections below, we will examine each of the three games featured in May.

CastleStorm: Definitive Edition (Xbox One), Available May 1-31

For the entire the month, Xbox One subscribers will have the opportunity to experience medieval combat in a rather cartoony side-scrolling environment. CastleStorm is a hybrid of the tower-defense genre and physics-based destruction games.

The premise of the title revolves around the never-ending struggle between knights and barbarians. Players have the ability to spawn troops and control siege weapons. Combat is rudimentary, consisting of simple sword swings. Gamers also have the ability to customize their home castles. The point of this game is to bring down the enemy's stronghold through various means of attack.

CastleStorm's estimated retail price is $14.99.

Pool Nation FX (Xbox One), Available May 1-31

Games for Gold members will be the first ones ever to try this title. Players will play a virtual game of pool that boasts photo-realistic graphics and real-world physics. There will be a variety of game modes that includes online matches. Gameplay revolve around rule sets. If the player is up to the task, he or she may compete in Leagues.

Mafia II (Xbox 360), Available from May 1-15 on Xbox 360

This four-year-old sandbox title is the sequel to the original Mafia: The City of Lost Heaven videogame. Players take on the role of Vito, an ambitious Italian American who has just returned from fighting in WWII. To pay off his father's debt, Vito starts working for the Italian mob. Eventually, the character rises through the ranks of the 1950s criminal underworld.

Missions include bank robberies as well as violent assassinations. Players can also fast drive around the city while listening to period music. Combat ranges between gunfights and fist-to-fist brawls.

Mafia II's estimated retail value is $19.99.

F1 2013 (Xbox 360), Available from May 16-31

Based on the real-life racing franchise, this game has players driving on virtual racetracks in beautifully rendered F1 racecars. F1 2013 has every vehicle, driver, and circuit in the 2013 FIA Formula One World Championship. Nostalgic racing fans will also be able to relive the racing circuit in the 1980s.

Since its debut, F1 2013 has been praised for its realism and stunning visuals. Sadly though, the game will not be available until the last half of May.

F1 2013's estimated retail price is $49.99.