I installed to /usr/local/games/PenumbraCollection.
The installer created this launch script for Penumbra: Overture.
#!/bin/sh
P=`dirname ${0}`
${P}/Overture/overture
There is no 'overture' in /usr/local/games/PenumbraCollection/Overture, but there is a 'penumbra' which does what I suppose 'overture' was intended to do, which is run penumbra.bin.
Changed it to this and it works.
#!/bin/sh
P=`dirname ${0}`
${P}/Overture/penumbra
Might want to fix that in your installer, however.
Thanks for the great games, and thanks for supporting Linux.