Selaco's Koala Bear mega secret

Bear location: i.imgur.com/az9k4wG.png
2nd bear location: i.imgur.com/BVaXgjO.png
3rd bear location: i.imgur.com/88PY1HL.png
Secret location: i.imgur.com/LedYhTn.png
Also note: There's a Wolfenstein-style secret just to the right of this.
i.imgur.com/Q45GRKr.jpeg
Game: Selaco

[@TalkernateHistory]

Finding the fourth book for the library secret is driving me nuts
Oh wait, it was in the bathroom

[@sbz666_]

Do you know if there's anywhere I can get a Koala if that one was damaged? The thing doesn't accept damaged plushies.

[@SyrupBuccaneer]

The Dev said on the Steam forums that there are others but I don't think I've seen one yet.

[@interlinkedMedia]

Yeah been looking for hours..

[@baivesan]

So, i saw this plush Koala on some pipes and decided it needs a shotgun blast. 2 weeks later when looking for secrets: "Wait, why is there a koala on a sign next to this hole? oh, please, NO!" Then i watched the video...

[@SyrupBuccaneer]

For future readers I found another one in Plant Cloning Facility. See description for location

[@indiomoustafa2047]

How do I open the gate that blocks the green stairs that leads up to the koala machine?