When looking for the best multiplayer adventure games, the ideal choices depend on whether you want a dedicated two-player cooperative journey, an expansive open-world sandbox, or a chaotic tactical shooter to tackle with a full squad.
Story-Driven & Cooperative Masterpieces

It Takes Two – A genre-bending, purely cooperative platform adventure built for exactly two players. You and a partner play as a clashing couple turned into dolls, navigating a wildly imaginative world that constantly introduces new, creative mechanics requiring tight coordination.

Baldur's Gate 3 – A massive fantasy RPG that accommodates full drop-in/drop-out co-op. You can experience the entire deep, choice-driven narrative with friends, splitting up across the map, getting into separate shenanigans, or combining your unique D&D-inspired abilities in tactical combat.

Portal 2 – A benchmark for cooperative puzzle-adventures. It features a standalone two-player campaign where both players wield portal guns and must master momentum, physics, and precise timing to navigate Aperture Science facilities.[1]
Open-World & Sandbox Adventures

Sea of Thieves – A shared-world pirate adventure where you and a crew of friends operate a ship together—raising anchors, adjusting sails, firing cannons, and charting courses to hidden islands. Every voyage turns into an unpredictable emergent story when other player crews appear on the horizon.

Valheim – A brutal yet deeply rewarding Viking-inspired survival and exploration game. Exploring procedurally generated wilderness, building massive longhouses, and sailing across stormy oceans with a group of friends captures a classic sense of frontier adventure.

Grounded – A unique spin on survival-adventure where you are shrunk to the size of an ant in a suburban backyard. Working together to craft gear, build towering bases out of blades of grass, and conquer giant insects makes it an incredible cooperative journey.
Action & Squad-Based Expeditions

Deep Rock Galactic – A 1-to-4 player co-op FPS featuring space dwarves, fully destructible cave systems, and swarms of alien monsters. The combination of class-based teamwork, mining, and frantic extraction creates one of the most cohesive cooperative loops in gaming.

Monster Hunter Wilds – A sprawling action-adventure that streamlines the iconic series of tracking and slaying colossal beasts. Hunting with up to three other players through dynamic, changing environments feels fluid, weighty, and visually stunning.
If you let me know how many players you have in your group and your preferred platform (PC, PlayStation, Xbox, or Switch), I can narrow down a recommendation that fits your exact game night setup.