Quick answer: Graveyard Keeper 2 only saves when you sleep. There's no manual save and no autosave during the day, so if you quit, crash or get stuck before sleeping, you lose everything since the last night. For a demo save transfer, PC demo saves carry over to the full game automatically; if yours didn't, copy the .info and .dat files from the demo folder to the full-game folder (below). Switch demo progress does not transfer.

Players search this as save, save location and demo save transfer. German players search Spielstand übertragen ("transfer save"), sometimes with Steam Deck. Some type it in a hurry as demo save goes to full releade; they all mean moving demo progress into the full game. On Steam, the thread Game needs an auto-save on day change asks for the autosave the game doesn't have.

Quick facts

  • When it saves: only when you sleep in your bed
  • Manual save: none
  • PC demo saves: carry over automatically; copy them by hand if not
  • Switch demo saves: don't carry over (tinyBuild support)
  • Backup: demo saves can also be downloaded from Steam Cloud

Save location (PC)

GameFolder
Full game%USERPROFILE%\AppData\LocalLow\Lazy Bear Games\Graveyard Keeper 2
Demo%USERPROFILE%\AppData\LocalLow\Lazy Bear Games\Graveyard Keeper 2 Demo

How to transfer a demo save to the full game

Open the demo folder

Paste the demo path into File Explorer. You can also download the demo saves from Steam Cloud.

Copy the save files

Copy the .info and .dat files.

Paste into the full-game folder

Start the full game and load.

This is the method from the developers' pinned troubleshooting post on Steam. The Steam Deck folder path isn't confirmed yet.

Staying up for days loses more than sleep. One player stayed awake several days to get the tired effect, the game crashed, and all of it was gone. Sleep before anything risky.

When to sleep so you don't lose a day

FAQ

Related

Sources: the developers' "Known issues, Bug reports, and Troubleshooting" post on Steam, tinyBuild support, Steam Community discussion "Game needs an auto-save on day change".