Stray is a game that stars two protagonists - in addition to the titular stray cat, there's also the friendly B-12 drone. From our guide, you will learn whether you can play the game in co-op mode.
Unfortunately, despite having a companion, Stray is an exclusively single player game. Neither you nor another player can control B-12 directly. You are limited to asking the drone to perform various activities. All these actions are done automatically after issuing the command. For this reason, B-12 is more accurately described as an AI companion.