We’ve added save support on Steam.
Starting Friday, September 19, the game supports Cloud Saves. This lets you carry your data across multiple PCs (e.g., if you play on two computers).
If you use more than one PC, we recommend this flow:
Launch the game on the PC that has the data you want to keep.
Play for a short while to sync the save to the cloud.
Then launch and play on the other PC to pull the data down.