Cosmic Explorer

 is a challenge in Risk of Rain 2. It is completed by entering 3 unique portals.

Tips

 * The Blue, Gold and Celestial Portals can all be accessed after completing a Teleporter Event.
 * The Blue Portal can spawn randomly, or the player can activate a Newt Altar with 1 lunar coin.
 * The Gold Portal spawns after the player activates an Altar of Gold.
 * The Celestial Portal spawns on Rallypoint Delta and Scorched Acres, after the player has looped at least once.
 * The Null Portal can be found in Bazaar Between Time.