In Risk of Rain 2, how to enter the Planetarium of Risk of Rain 2 can be referenced as follows:
1. First enter the Void Secret Realm in the Moon Shop (that is, guard 9 points). After guarding, a new portal will appear in front of the original portal. Enter the void trajectory through the portal.
2. After activating the four deep space signals similar to the Midea Pass, a deep space portal will appear and enter the hidden scene planetarium.
3. After entering, there will be a boss at the same level as Mi Daddy. You have to kill it three times in total. After the first two kills, cracks will appear. Entering the cracks will be a parkour. After killing the virtual spirit for the third time, a portal will appear. Enter the portal to clear the level.
