Planetside was an incredibly ambitious massively multiplayer online first-person shooter (MMOFPS) where players from three separate empires would wage a never-ending war against one another for territory on alien planets.
It was released back in 2003, and for many years enjoy a healthy playerbase until, as it continued to age, it was neglected by its developer more and more. When Planetside 2 came out, Planetside 1 was all but shut down, and when the game went free to play some time later it became infested with hackers who flourished without developer intervention.
Eventually, the decision was made to close Planetside down permanently, and on July 1st, 2016 the servers closed at 4:00 PM PT. This video documents some of the final moments, including a montage of earlier battles that were happening throughout the day.
RIP Planetside. May your worlds never know peace.