It Takes Two by Hazelight Studios is arguably the best co-op game of the 2020s so far. While plenty of great projects support cooperative multiplayer, very few implement the feature as a built-in requirement. Yes, Hazelight opted against providing a single-player option for the campaign; if somebody wants to experience It Takes Two, they will need to find someone willing to tag along for the ride. Such a risky move could have backfired, but this co-op exclusivity meant the game could be designed specifically to prioritize and highlight two-player coordination.