The app must not leave the user stuck at any point in the experience.
Required - Yes
For example, if you require a login, you must provide instructions for successfully creating an account. The instructions must be discoverable in VR, but account creation could happen in 2D. Game levels must not have broken logic that prevents progressing to the next level.
User must be able to play through the entire title without being unable to progress or requiring unobtainable information.