1 posts Member, Battlefield 3, Battlefield 4, Battlefield Member. Archive as of 19 November 2020, no future updates. A party can be as big as 4 players, doing main missions as well as side quests together. We believe that by sharing this data, we'll be able to spot problems earlier, improve the Steam service more efficiently, and ultimately build better products and experiences. Borderlands 3 allows you to play co-op with your friends by inviting them to your party. Returning players who have earned at least one trophy in the last month. Top Contributors: Hector Madrigal, Sng-ign, PeterRabbitts + more.