Graveyard Keeper 2 PR Machine

The machine comes from the Congregation Trouble quest with Gunter: charge a Hypno-device, return it to Gunter and hold a test sermon.

Steam's own pages do not explain the quest or the machine, so everything below comes from community guides.

Our Hypno-device page covers where to buy the device and how to charge it.

The basic input is a Charged hypno-device: an uncharged Hypno-device plus 1 Faith, made at the Formulation Bench.

Bigger programs add Newspapers, and guides say a later upgrade lets Newspapers replace devices or work alongside them.

Load it on the Gluttony day. That is the one day of the six-day week it can be started, so plan your devices before it arrives.

A program raises the zombie limit by 10 to 80 for 1 to 5 weeks, depending on the machine tier. When it ends, the bonus is gone.

The zombie count is compared with the limit each time a program starts or ends, so a lapsed program can bring the debuff back.

For a permanent +10 instead, the Good fellow talent does that without any machine.

One guide lists +10 for 1 week at 2 devices and +20 for 2 weeks, running up to +80 for 5 weeks. Another lists +20 at 3 devices and +30 at 5. A third says the largest program needs the machine upgraded to its fifth level.

These are community numbers from the early weeks after launch and they may reflect different patches. Treat the in-game preview, which shows the increase before you confirm, as the final word.

If you keep only a handful of zombies, Good fellow may be enough. A large factory runs over the limit all the time, and then the machine is a weekly habit that protects your sermon income.

Our zombie limit page explains what the debuff costs and the checks that trigger it.