https://wccftech.com/multiple-controller-support-soon-to-be-possible-for-google-daydream/

Google Daydream is the long-awaited successor of Google Glass (we all know how that went). Unlike the Google Glass, DaydFor ream is pretty good and is one of the better products available in the VR market. The best part is its seamless integration with the Unity game engine which opens up endless possibilities for game developers. Until now, Daydream supported only a single controller, which is essentially a Wiimote with a few bits and bobs on top of it. However, that is set to change as XDA Developers spotted several mentions of multiple controller support in the latest Daydream SDK.

Support for more than one controller doesn’t imply that multiplayer gaming will be possible on the handset. It merely paves the way for additional controllers to be added to the mix, allowing for more complex inputs. For example, you can have a controller in each hand that do different things. It’ll definitely make for a better, more immersive gameplay experience as your other hand won’t be idle in a game.