Is Thief Simulator on Game Pass?

No, only to buy: from €19.50 on Steam.

Is Thief Simulator on Nintendo Switch Online?

No, only to buy: from €19.99 on Nintendo eShop.

Yes, with GeForce NOW and Boosteroid (you need your own copy).

From €19.50 on Steam; also Nintendo eShop €19.99.

In no subscription, buy only

Buy

Cloud

Prices are the store price, without subscription discounts. Struck through: the price before the discount.

Is Thief Simulator on Game Pass?: No, only to buy: from €19.50 on Steam.
Is Thief Simulator on Nintendo Switch Online?: No, only to buy: from €19.99 on Nintendo eShop.
Can you play Thief Simulator in the cloud?: Yes, with GeForce NOW and Boosteroid (you need your own copy).
How much does Thief Simulator cost?: From €19.50 on Steam; also Nintendo eShop €19.99.