For many, the words "four-player online co-op" is like catnip.
Guerrilla Games will release just such a mode for Killzone: Shadow Fall in June, and they'll release the mode later this year as a "standalone version." We're just going to assume that we won't need the original game to play it; hence the definition of "standalone."
The new Intercept expansion in June will be a free download if you have the Season Pass, but we don't know if those without the Pass will be able to purchase it separately. This DLC boasts an infiltration and reconnaissance mission, where you and three friends will relay Helghast intel back to HQ via uplinks. Establishing an uplink is tied to the team's score, and this can be enhanced in a number of ways. Kills and recaptures will help as well.
The co-op mode will also come with four arena maps derived from locations in the campaign. If you're still enjoying Shadow Fall , here's more reason to stick with it!
Related Game(s): Killzone: Shadow Fall