Is there any toutrial how to run witcher on linux?? After unpacking and runing start.sh i get this
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sh start.sh
start.sh: 6: start.sh: declare: not found
start.sh: 7: start.sh: declare: not found
start.sh: 8: start.sh: declare: not found
start.sh: 9: start.sh: declare: not found
start.sh: 12: start.sh: Bad substitution
start.sh: 12: start.sh: declare: not found
start.sh: 18: start.sh: source: not found
start.sh: 41: start.sh: define_option: not found
start.sh: 44: start.sh: standard_options: not found
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after runing ./game/witcher2 i get this
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./game/witcher2: error while loading shared libraries: libSDL2-2.0.so.0: cannot open shared object file: No such file or directory
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i ould like to admit that i have libsdl2 installed
My distro : Linux ASUS 3.16.0-4-amd64 #1 SMP Debian 3.16.7-2 (2014-11-06) x86_64 GNU/Linux

1. Just do ./start.sh
2. You need to install the i386 versions of libsdl2. I think the packages that it needs are libsdl2:i386 and libsdl2-image:i386

Better to use bash with .sh files, as many of them actually bash scripts and won't work with sh.
And devs really should add SDL2 libs to game archive.
LD_LIBRARY_PATH=./libs blahblah will work just fine. Actually many commercial games use this approch, it makes game bigger by 10-100 megabytes max but allows to run on any distro, even future one.