Hello

no matter where I can look for the error here

I want to start New n Tasty by ./start.sh

but I get the following:

Running Oddworld: New 'n' Tasty
Set current directory to /home/user/GOG Games/Oddworld New n Tasty/game
Found path: /home/user/GOG Games/Oddworld New n Tasty/game/NNT.x86
Mono path[0] = '/home/user/GOG Games/Oddworld New n Tasty/game/NNT_Data/Managed'
Mono path[1] = '/home/user/GOG Games/Oddworld New n Tasty/game/NNT_Data/Mono'
Mono config path = '/home/user/GOG Games/Oddworld New n Tasty/game/NNT_Data/Mono/etc'
support/gog_com.shlib: Zeile 94: 4908 Abgebrochen (Speicherabzug geschrieben) ./"${bin_64}"

If this is usefull:
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tahiti XT [Radeon HD 7970/8970 OEM / R9 280X]

Are you running official AMD drivers or unofficial? Do you have installed Mono runtimes? New n Tasty runs on Unity, which has Mono runtimes dependencies. Please try to install them, too.