You errors are really bad formatted in your post and french is a language not everyone understands (like me), making it generally harder or at least less comfortable to help you. Since you want the help, I strongly advise you to post your errors correctly formatted and at best in English.
Here, better formatted:
Code:
Gravité Code Description Projet Fichier Ligne État de la suppression
Erreur C2220 avertissement considéré comme une erreur - aucun fichier 'object' généré CSCommon C:\Users\Carob\Downloads\RaiderZ-Source\Develop\CSCommon\source\FSContext.cpp 97
Erreur C2196 la valeur associée à case '192' est déjà utilisée CSCommon C:\Users\Carob\Downloads\RaiderZ-Source\Develop\CSCommon\source\FSContext.cpp 105
Erreur C2196 la valeur associée à case '192' est déjà utilisée CSCommon C:\Users\Carob\Downloads\RaiderZ-Source\Develop\CSCommon\source\FSContext.cpp 113
Erreur C1083 Impossible d'ouvrir le fichier include : 'json.hpp' : No such file or directory GameServer_lib c:\users\carob\downloads\raiderz-source\develop\server\gameserver\main\GTalentCoolTimeSqlBuilder.h 3
Erreur LNK2001 symbole externe non rÚsolu "public: virtual void __thiscall GTalent::ActStart(void)" (?ActStart@GTalent@@UAEXXZ) GameServer_app C:\Users\Carob\Downloads\RaiderZ-Source\Develop\Server\GameServer\app\GameServer.lib(GExtraActiveTalent.obj)1
Erreur LNK2001 symbole externe non rÚsolu "public: virtual void __thiscall GTalent::ActStart(void)" (?ActStart@GTalent@@UAEXXZ) GameServer_app C:\Users\Carob\Downloads\RaiderZ-Source\Develop\Server\GameServer\app\GameServer.lib(GTalentFactory.obj) 1
Erreur LNK2001 symbole externe non rÚsolu "public: virtual void __thiscall GTalent::ActStart(void)" (?ActStart@GTalent@@UAEXXZ) GameServer_app C:\Users\Carob\Downloads\RaiderZ-Source\Develop\Server\GameServer\app\GameServer.lib(GTalent.obj)1
Erreur LNK2001 symbole externe non rÚsolu "public: virtual void __thiscall GTalent::ActStart(void)" (?ActStart@GTalent@@UAEXXZ) GameServer_app C:\Users\Carob\Downloads\RaiderZ-Source\Develop\Server\GameServer\app\GameServer.lib(GMagicTalent.obj) 1
Erreur LNK2001 symbole externe non rÚsolu "public: virtual void __thiscall GTalent::ActStart(void)" (?ActStart@GTalent@@UAEXXZ) GameServer_app C:\Users\Carob\Downloads\RaiderZ-Source\Develop\Server\GameServer\app\GameServer.lib(GItemTalent.obj) 1
Erreur LNK2001 symbole externe non rÚsolu "__declspec(dllimport) public: __thiscall std::basic_ostringstream<char,struct std::char_traits<char>,class std::allocator<char> >::basic_ostringstream<char,struct std::char_traits<char>,class std::allocator<char> >(int)" (__imp_??0?$basic_ostringstream@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAE@H@Z) GameServer_app C:\Users\Carob\Downloads\RaiderZ-Source\Develop\Server\GameServer\app\UnitTest++.vsnet2008MD.lib(Test.obj) 1
Erreur LNK2001 symbole externe non rÚsolu "__declspec(dllimport) public: void __thiscall std::_Mutex::_Lock(void)" (__imp_?_Lock@_Mutex@std@@QAEXXZ) GameServer_app C:\Users\Carob\Downloads\RaiderZ-Source\Develop\Server\GameServer\app\UnitTest++.vsnet2008MD.lib(Test.obj) 1
Erreur LNK2001 symbole externe non rÚsolu "__declspec(dllimport) public: void __thiscall std::_Mutex::_Unlock(void)" (__imp_?_Unlock@_Mutex@std@@QAEXXZ) GameServer_app C:\Users\Carob\Downloads\RaiderZ-Source\Develop\Server\GameServer\app\UnitTest++.vsnet2008MD.lib(Test.obj) 1
Erreur LNK2001 symbole externe non rÚsolu "__declspec(dllimport) public: int __thiscall std::basic_streambuf<char,struct std::char_traits<char> >::sputn(char const *,int)" (__imp_?sputn@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QAEHPBDH@Z) GameServer_app C:\Users\Carob\Downloads\RaiderZ-Source\Develop\Server\GameServer\app\UnitTest++.vsnet2008MD.lib(Test.obj) 1
Erreur LNK2001 symbole externe non rÚsolu "__declspec(dllimport) public: class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > & __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::operator=(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (__imp_??4?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAEAAV01@ABV01@@Z) GameServer_app C:\Users\Carob\Downloads\RaiderZ-Source\Develop\Server\GameServer\app\UnitTest++.vsnet2008MD.lib(MemoryOutStream.obj) 1
Erreur LNK2001 symbole externe non rÚsolu "__declspec(dllimport) public: __thiscall std::exception::exception(void)" (__imp_??0exception@std@@QAE@XZ) GameServer_app C:\Users\Carob\Downloads\RaiderZ-Source\Develop\Server\GameServer\app\UnitTest++.vsnet2008MD.lib(AssertException.obj) 1
Erreur LNK1120 7 externes non rÚsolus GameServer_app C:\Users\Carob\Downloads\RaiderZ-Source\Develop\Game\Runtime\Dev\GameServer\GameServer_r.exe 1
Now, just look at the errors.
C2220: Warning considered an error. So the project is configured so that warnings are considered errors as well. So you must get rid of the warnings (which are not shown in your errors, most likely because you masked them out).
The both C2196 errors tell you that there is a switch statement, where the case 192 is handled two times. Each case must not be handled more than once, so make sure of that and the error is gone.
C1083 is telling you that a file (here json.hpp) gets included, which wasn't found. So that file is missing (maybe some third party dependency?). Get the file, so it can be included to get rid of that error.
The first five LNK2001 errors try to tell you that the function GTalent::ActStart was used (in five different object files), but the function wasn't actually defined anywhere. A function must be defined in order to be used. Insert the definition (code / logic of the function) to get rid of those errors.
The next six LNK2001 errors tell you that the definition for some STL functions apparently used in unit tests are missing. That is most likely due to a misconfiguration regarding the runtime library since those functions should be defined within those. I guess somehow the project do not link against the runtime library or something like that.
LNK1120 just tells you that there are unresolved LNK2001 errors. Get rid of the LNK2001s and the error is gone as well.
Maybe that helps you, but that is all that someone who doesn't have the project can deduct from those errors.
With best regards