Here’s a useful, focused review of the Resident Evil 5 4-Player Mod (PC, exclusive to modded gameplay—not an official mode).

Released in 2009, Resident Evil 5 was a game-changer for the series, introducing a more action-oriented gameplay style and a gripping narrative that explored the darker side of the Umbrella Corporation. Players took on the roles of Chris Redfield and Sheva Alomar, a BSAA agent, as they navigated the streets of Africa, fighting against hordes of Majini, the mind-controlled zombies.

Nexus Mods: Search for "4 Player Co-op" or "Mercenaries Collaboration" scripts.

Prerequisites:

Introduction

Because the game engine was designed for only two players, several technical hurdles exist:

Four players, one boulder, zero chill.

Benefits and Drawbacks