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Steam News22 September 20259mo ago

The Watcher 1.5 Update

Hey Slug c ats, If y o u have been following along with the Rain World news, you might have seen that the Watcher will be receivi n g a 1.5 content update on September 25th!

In this update1

Full notes

Full Rain World update

Read the full published notes in a cleaner layout. The original post stays linked below.

Repeated intro

Hey Slug c ats,

What changed

0 fixes4 additions1 change0 removals
  • Gameplay
addedWatcher 1.5Arena mode support for T he Watcher New unlockables for Arena mode to be found!
changedWatcher 1.5Retroactive Jolly Co-op support for all five of the More Slugcats campaigns which previously did not have official Co-op support
addedWatcher 1.5New regi o ns
addedWatcher 1.5Several new creatures and items
addedWatcher 1.5New endi n gs

Rain World changes

addedArena mode support for T he Watcher New unlockables for Arena mode to be found!
changedRetroactive Jolly Co-op support for all five of the More Slugcats campaigns which previously did not have official Co-op support
addedNew regi o ns
addedSeveral new creatures and items
addedNew endi n gs

If y o u have been following along with the Rain World news, you might have seen that the Watcher will be receivi n g a 1.5 content update on September 25th!

I do wa n t to reveal some of the features that will be part of this update! This isn’t going to be a deep dive into the content but instead a bit of a flyov e r on what is going is coming! If you want to remain c ompletely in the dark about what is changing then you should turn away now.

Watcher 1.5

  • Arena mode support for T he Watcher

    • New unlockables for Arena mode to be found!

  • Jolly Co-op support for the Watcher campa i gn

  • Retroactive Jolly Co-op support for all five of the More Slugcats campaigns which previously did not have official Co-op support

  • New regi o ns

  • Several new creatures and items

  • New endi n gs

There are a couple other things that the developers have listed, but I think I’ll have to leave that for you to discover.

See you on September 25th!

- riv otter

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Source

Steam News / 22 September 2025

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