Heya,

just wanted to leave this here because I couldn't find it on this forum. There is a game breaking bug in the first Deponia in chapter 3. More precisely, when you assemble the hook before you shoot the lamp from the sealing with the slingshot, you can't disassemble it. This means you are stuck because you can't get the slingshot anymore. Apparently this bug has been in the game since forever, so it won't be fixed...

Are you sure it connot be reverted from inventory? I cant check it right now (Complete installed).
Also, there is saves collection on Daedalic support site. If that archvies still alive.