Environments

Environments are the playable stages within Risk of Rain 2. Traveling between main environments is done via the Teleporter. There are currently nine main environments available to be explored. After finishing the fifth environment, the challenge Deja Vu? is unlocked and the stage sequence loops. It is not possible to visit multiple environments of one stage in a single loop.

Each environment has three or more stage variations, with most changes being single features, such as a door being opened to reveal extended areas. Environments can contain secrets, and hidden treasures.

Hidden realms are environments not accessible through stage loops. These environments are usually have requirements that need to be met to be accessed.

Hidden Realms
Also known as intermission stages. Mysterious places where time seems to stop.

Environment Logs are found within each Hidden Realm. Upon being picked up, they unlock the Logbook Entry for the corresponding environment. They appear as a small shiny book on the ground in a set location and will always spawn. If you are playing in a group, only one member of the party needs to pick up the log for everyone to get the Logbook Entry.

Looping
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Looping occurs after leaving the Sky Meadow by using the Primordial Teleporter in its shifted state, or by exiting through a portal to a Hidden Realm such as Bulwark's Ambry or the Bazaar Between Time regardless of the Primordial Teleporter's alignment. Once this is done, the game will loop around to the first environment set. This repeats infinitely until the player obliterates themselves at the Obelisk in a Celestial Portal, beats the game, or dies.

Once you loop, several stages will have new enemies spawn on them, these being;
 * Jellyfish for Distant Roost and Titanic Plains
 * Hermit Crab for Titanic Plains
 * Alloy Vulture for Scorched Acres
 * Clay Templar for Abandoned Aqueduct
 * Void Reaver for Rallypoint Delta, Siren's Call and Sky Meadow

Additionally, after looping, monsters can spawn as Malachite and Celestine Elites.

Doing one full loop completes the challenge Deja Vu?.