Did our recent XCOM: Enemy Unknown review peek your interest? Or are you busy playing The Bureau: XCOM Declassified? Either way, 2k Games announces the arrival of more aliens in an expansion to XCOM: Enemy Unknown on November 12th, 2013.

XCOM: Enemy Within will follow up with new content, expanding on the turn-based tactical original. According to a press release from 2k Games North America, a variety of gameplay elements will be available:

"Key features for XCOM: Enemy Within will include:

• New Soldier Abilities: Research a new alien technology to advance the capabilities of operatives:

• Gene Mods: Construct the Genetics Lab to physically enhance operatives’ abilities, including augmentations to the chest, brain, eyes, skin and legs.

• MECs: Build the Cybernetics Lab to enable the construction of the new Mechanized Exoskeletal Cybersuit, or MEC. The new MEC Trooper class has specialized abilities and each suit can be upgraded with new weapons including the flamethrower, grenade launcher and more.

• New Weapons and Equipment: Give operatives an extra tactical edge with new projects from the engineering team in the Foundry;

• New Enemy Threats: Adopt new tactics to counter the threats from a host of new enemies, including the Mechtoid;

• New Strategic Resource: A valuable new alien resource, known as Meld, has been discovered. Secure it on the battlefield and use it carefully back at base to unlock new research and upgrades;

• New Tactical Challenges and Maps: Face new tactical challenges, on nearly 50% more maps;

• New Multiplayer Maps, Units and Abilities: Create custom squad from a wider array of options and dominate opponents in intense, one-on-one, turn-based matches."

The official announcement trailer is linked here.