GitHub

Master Key

Microtransactions in Master Key are summarized as...

The game contains no additional purchasable in-game content. The game does sell the soundtrack for the game, as well as a pack of bonus content. This bonus content is all out of the game, consisting of a hand-drawn map, cover art, and files for 3D printing.

👍
You buy it and that's it. No paid DLC. No microtransactions.