'Batman: Arkham Knight's' December DLC has arrived, and it is right on schedule. Season of Infamy: Most Wanted was launched on Tuesday across gaming platforms, including PlayStation 4, Xbox One, and PC.

According to Gamespot, the expansion pack includes new Batman and Batmobile skins, which are based on Christopher Nolan's "The Dark Knight" concepts. New missions are included in the expansion packs as well, which feature revered DC Comics villains such as The Mad Hatter, Killer Croc, Ra's Al Ghul and Mr. Freeze. This is reportedly the final DLC coming to the 'Batman: Arkham Knight' Season pass that gamers can download.

The expansion pack includes missions where Batman has to encounter some of Gotham's most menacing villains. Wonderland puts Batman in a hallucinatory, demented battle against The Mad Hatter. Batman finds himself engaged in a battle of wits within the pages of a storybook. Beneath the Surface sees Batman encountering Killer Croc in the doomed Iron Heights. Ra's Al Ghul returns for revenge with his League of Assassins in Shadow War. In the last mission, Batman encounters Mr. Freeze, who gets caught up in the Arkham Knight's Militia's plans to capture Batman.

IGN reports that the Season of Infamy DLC also includes the Crime Fighter's Challenge Pack #5, the 2008 Movie Batman Skin, inspired by Christopher Nolan's The Dark Knight movie, and the original Arkham Asylum Batmobile Skin, as well as a Rocksteady Themed Batmobile Skin.

All of the content is included with the Arkham Knight's $40 DLC pass. Gamers also have the option to purchase it separately.

Gamers can also access a batch of free Arkham Knight DLC. Some of these can only be accessed with previously released paid content.

Arkham Knight gamers have the option of accessing Batsuit v8.05 Prestige Edition after completing 240 percent of the game. Players can get their hands on the Classic Harley Quinn Skin when they have purchased the Harley Quinn Story Pack or Crime Fighter Challenge Pack #5. This skin can be used in the Harley Story Pack or in AR Challenges. The Arkham Knight Skin can be accessed by players who own the Red Hood Story Pack. This skin can be selected from the character showcase for Red Hood, and will allow them to look like the Arkham Knight in the Red Hood Story Pack and AR Challenges.

The Community Challenge Pack, which feature seven challenge maps featured in the previous Batman Arkham games, is coming in January.