4-Players PC Couch Co-op Shoot'em Up - 1.0 - Release Announcements

Steam Curator: More Than 4 Local Multiplayer

WayForward on X: A quick update on River City Girls 2's multiplayer modes: to ensure the best experience possible, RCG2 will feature 2-player online co-op, as well as local co-op for up

You can play 4-player co-op in Dying Light 2, but one of you must host

Redfall's Co-op Will Allow All 4 Players to Play as the Same Character

Steam Workshop::4 Player Co-op

Era: Survival Colony - A co-op card game for 1-4 players by Shades of Vengeance — Kickstarter

Couch Coop Multiplayer (up to 4 players) [The Legend of Zelda: Breath of the Wild (WiiU)] [Mods]

Halo 5's 4-Player Co-Op Allows for a Much More Sociable Story - GameSpot

This great settlement-building survival RPG just became a 4-player co-op game

Team up with friends to slay hordes of aliens in the 4-player co-op top-down shooter Killsquad — Analog Stick Gaming