Open Lobby 277 is a Diepcord Event designated to celebrate the r/diepio Subreddit's 8000 subscribers, and after the Diep world cup, Sauna Girl entered the red color constant as the other players fight each other. For submissions, the criteria is they get to Level 30 with maxed out movement speed.
Unlike Wednesday Wars and Boner's Chat events, which occur weekly as well, there weren't any prior annpouncements, which is why Open Lobby 288 is not on this article.
ATOM: To celebrate reaching 8000 subscribers on r/diepio, we'll be taking over an entire 4TDM map. Your build is mostly unrestricted, however you must have your movement speed maxed. You may use any tank.