The The Door to the Oniverse expansion Add-on for Onirim - Solitaire Card Game has 16 achievements.
Win a game after setting nightmare to be the next card in the deck using prophecy or squirrel spies.
Use the chromatic chaos on the drawn door to immediately unlock it with a key.
Rally and use each unique denizen at least once.
Win the game after rallying 8 denizens.
After discarding all cards of the kind, use the Cyclobot to get one of them back.
Open a door with a key kept by the Treasure Keeper.
Discard at least 5 cards in a row using the Hammer Bird.
Play the card kept with the Treasure Keeper after at least 20 turns.
Win the Door to the Oniverse game without rallying any denizens.
Discard the last nightmare in the deck with the Harpoon Hunter.
Discard at least 3 nightmares with a single the Harpoon Hunter.
Create a sequence of 3 cards of the same symbol by using the Architect.
Play two cards from two Treasure Keepers in a row.
Use the Cyclobot to regain discarded crossroad key.
Unlock Door to the Oniverse with the Crossroad key.
Unlock Door to the Oniverse using incantation.