A "multiplayer arena" refers to a virtual or physical location where multiple people can come together to engage in a competitive game or activity. It involves playing games or competing against other players in a shared environment. Full definition
From here you can take on a 24 mission single player story campaign or go head to head in multiplayer arena combat allowing for up to four players at a time. (thatvideogameblog.com)
After a tumultuous approach to the game's launch, how does it stack up in the competitive multiplayer arena? (nextgengamingblog.com)
Play new cooperative activities and compete in new multiplayer arenas. (amazon.com)