And what a nice gift that is for PC owners of XCOM 2: War of the Chosen. Those Firaxis cats know how to treat their fans. The Tactical Legacy Pack bridges events between the brilliant Enemy Unknown and XCOM 2 and will be available for free from October 9 till December 3, even for people purchasing the game for the first time in that space, from December 4 you need to purchase it.

It also features "new game modes, maps, weapons, armour and Photobooth options".

NEW GAMEPLAY MODES:

• Legacy Ops – Command a squad of soldiers through a series of linked consecutive tactical missions:
  • § Central’s Archives – Central Officer Bradford, and other key members of XCOM, recount the pivotal operations that led to the rise of the resistance between the events of XCOM: Enemy Unknown and XCOM 2:
    • Blast from the Past – After the fall of XCOM HQ, Central Officer Bradford begins his journey to build the resistance by returning to where it all began.
      
      
    • It Came from the Sea – The broadcast of a fledgling radio DJ is reaching an audience he didn’t intend. It’s up to Central to save the DJ from an endless horde of hungry listeners.
      
      
    • Avenger Assemble – Join Lily Shen as she works to retrofit the Avenger into a new home for the growing forces of a reinvigorated XCOM.
      
      
    • The Lazarus Project – ADVENT is kidnapping key members of the resistance, and it’s up to Central to rescue some of XCOM's most renowned operatives.
      
      
    • Resistance Archives – Engage enemy forces in series of tactical missions increasing in difficulty.
• Skirmish Mode – Create and play your own custom XCOM tactical missions using the included editor that allows you to modify various settings (map, squad loadouts, objective, enemies, and more.)

NEW MAPS: Engage in battle across 28 new maps including remastered maps and scenes from XCOM: Enemy Unknown and XCOM: Enemy Within. These new maps will be featured in Central’s Archives.

NEW WEAPONS AND ARMOR: Equip your soldiers with reimagined versions of the conventional, laser, and plasma weapons, as well as Kevlar, Carapace, and Titan armour from XCOM: Enemy Unknown. Complete Central’s Archives to unlock these new additions for use in the main single player campaign.

NEW CUSTOMIZATION AND PHOTOBOOTH OPTIONS: Customize your soldiers with new attitudes and helmets. Create new images in the Photobooth with additional backgrounds, colours, and character poses.

NEW SOUNDTRACK OPTIONS: With the new Soundtrack Selector you can choose to play the XCOM 2: War of the Chosen campaign with the existing score, the score from XCOM: Enemy Unknown, or an all-new soundtrack inspired by the music from the original X-COM: UFO Defense.

OFFLINE CHALLENGE MODE: Play through all 100+ War of the Chosen challenges as often as you want.

But don't take our word for it, watch a trailer detailing all of the above, embedded below.