multi-player

/M AH1 L T IY0 P L EY0 ER0/
noun
  1. 1

    (games) The feature of a video game where multiple human players play simultaneously.

    โ€œI just heard that the game will have multiplayer when it comes out!โ€

adjective
  1. 1

    (games) Requiring or allowing multiple human players to play simultaneously.

Source: https://en.wiktionary.org/wiki/multi-player, https://en.wiktionary.org/wiki/multiplayer