Please consider adding a toggle for multiplayer counterOps so other players can invade a mission, instead of bots oppose the player trying to complete objectives. It would be similar to counterOps in Perfect Dark N64 or invasion in Dark Souls. The invading player (attacker) would play it as a VR game in the portal and move with joysticks, while the defender plays it outside the portal as an MR game 'within their room'.

Reference: