Sheltered won't load

After the last update of my system, Sheltered ran from Steam, wouldn't load. Which obviously left me devastated or at least very curious what the hell went wrong.
The error I got from running Steam from console was:
GameAction [AppID 356040, ActionID 2] : LaunchApp changed task to WaitingGameWindow with ""
ERROR: ld.so: object '~/.local/share/Steam/ubuntu12_32/gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.
GameAction [AppID 356040, ActionID 2] : LaunchApp changed task to Completed with ""

But later, after running the game from its directory with
 ./Sheltered.x86_64
it transformed into:
Set current directory to ~/Steam/steamapps/common/Sheltered
Found path: ~/Steam/steamapps/common/Sheltered/Sheltered.x86_64
Mono path[0] = '~/Steam/steamapps/common/Sheltered/Sheltered_Data/Managed'
Mono path[1] = '~/Steam/steamapps/common/Sheltered/Sheltered_Data/Mono'
Mono config path = '~/Steam/steamapps/common/Sheltered/Sheltered_Data/Mono/etc'
displaymanager : xrandr version warning. 1.5
client has 4 screens
displaymanager screen (0)(eDP1): 1920 x 1080
Using libudev for joystick management


Importing game controller configs

Oddly enough, the game would run in I'm offline. 
 So the solution, turned out to be, starting it with:
 ./Sheltered.x86_64 LIBGL_ALWAYS_SOFTWARE=1

After which, the  game started running also from Steam. Go figure.

In the meanwhile, I found this useful script for redirecting the errordump of Steam:

cd ~/.local/share/Steam/linux32
mv steamerrorreporter steamerrorreporter.bak
echo "#!/bin/bash" >steamerrorreporter
echo "exit 0" >>steamerrorreporter
chmod a+x steamerrorreporter

source 

And also, to speed up the game launch:

echo "" > /proc/sys/kernel/core_pattern

And also, note the great Arch Steam/Troubleshooting site.  

Also oddly enough, KSP starts ok with:

vblank_mode=0 optirun -b primus %command%

even though the suggested is: 

LD_PRELOAD="libpthread.so.0 libGL.so.1" __GL_THREADED_OPTIMIZATIONS=1 %command%_64 -force-gfx-direct 

Other suggested options:

 LD_PRELOAD="libpthread.so.0 libGL.so.1" __GL_THREADED_OPTIMIZATIONS=1 optirun steam

or 

find ~/.steam/root/ \( -name "libgcc_s.so*" -o -name "libstdc++.so*" -o -name "libxcb.so*" \) -print -delete 

or

Remove:

.local/share/Steam/ubuntu12_32/steam-runtime/i386/usr/lib/i386-linux-gnu/libstdc++.so.6

.local/share/Steam/ubuntu12_32/steam-runtime/i386/lib/i386-linux-gnu/libgcc_s.so.1

.local/share/Steam/ubuntu12_32/steam-runtime/amd64/lib/x86_64-linux-gnu/libgcc_s.so.1

.local/share/Steam/ubuntu12_32/steam-runtime/amd64/usr/lib/x86_64-linux-gnu/libstdc++.so.6

.local/share/Steam/ubuntu12_32/steam-runtime/i386/usr/lib/i386-linux-gnu/libxcb.so.1 

or

 rm ~/.local/share/Steam/ubuntu12_32/steam-runtime/i386/usr/lib/i386-linux-gnu/libstdc++.so.6

I did those and also, I did a reset of Steam and that made Steam stop loading for quite a while, so be careful with those.  

Location of the error dump:

/tmp/dumps     

or

LD_PRELOAD="libpthread.so.0 libGL.so.1" __GL_THREADED_OPTIMIZATIONS=1 optirun steam