Update: Collection 2 is now available on Steam.

Infinity Ward has just announced that Modern Warfare 3 players on PC will be able to purchase Collection 2 tomorrow, June 21st. In addition, new game mode “Face Off” with two maps, Erosion and Aground, will be released on the platform for free.

Modern Warfare 3 Collection 2 includes:

• Three multiplayer maps: Foundation, Sanctuary, and Oasis
• Spec Ops missions: Kill Switch and Iron Clad
• Face Off maps: Lookout and Getaway

Collection 2 isn’t up for pre-order on Steam at the time of writing, but should cost $14.99 when it becomes available. You can read our Collection 2 review through here.

This is the first time that Infinity Ward releases MW3 DLC for PS3 and PC on the same day, as Collection 2 will also released on PSN tomorrow.