Hello!
I'm official Steam Linux beta-tester. I got Amnesia DD in my Steam library.
The last generated output to console:
terminate called after throwing an instance of 'std::length_error'
what(): basic_string::resize
This is a message generated before crash Amnesia DD...
I
played ADD much time before non-steam version without problems on
64-bit Linux, although there was crashes, but not at start of the game.
When running from Steam/Linux - crash happening every time after brief intro from developers and gamma selection slider and then crash.
How to contact with developers? This is not solved for a long time...