Instant error on startup when using app-local deployment on XP:
. 0 Id: 78c.50c Suspend: 1 Teb: 7ffdd000 Unfrozen
ChildEBP RetAddr
0012fe40 003abb79 kernel32!RaiseException+0x53
0012fe9c 003ab6a9 MSVCP140!__delayLoadHelper2(struct ImgDelayDescr * pidd = 0x003b4070, <function> ** ppfnIATEntry = 0x003d702c)+0x16c [f:\dd\vctools\delayimp\delayhlp.cpp @ 323]
0012fedc 0038c45f MSVCP140!_tailMerge_CONCRT140_dll+0xd
*** WARNING: Unable to verify checksum for pyrogenesis.exe
0012fee8 004eb99e MSVCP140!_Mtx_init_in_situ(struct _Mtx_internal_imp_t * mtx = 0x007c0d20, int type = 0n2)+0xf [f:\dd\vctools\crt\crtw32\stdcpp\thr\mutex.c @ 44]
0012ff18 004018d8 pyrogenesis!CLogger::CLogger(class std::basic_ostream<char,std::char_traits<char> > * mainLog = 0x007c0c98, class std::basic_ostream<char,std::char_traits<char> > * interestingLog = 0x007c0c98, bool takeOwnership = false, bool useDebugPrintf = true)+0x8e [e:\jenkins\workspace\vs2015_autobuild\source\ps\clogger.cpp @ 83]
0012ff2c 009381cd pyrogenesis!`dynamic initializer for 'nullLogger''(void)+0x18 [e:\jenkins\workspace\vs2015_autobuild\source\ps\clogger.cpp @ 49]
0012ff48 006b4524 ucrtbase!_initterm+0x6d
0012ff8c 00664a3f pyrogenesis!__scrt_common_main_seh(void)+0x7b [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl @ 221]
0012ffc0 7c816037 pyrogenesis!CallStartupWithinTryBlock(void)+0x3f [e:\jenkins\workspace\vs2015_autobuild\source\lib\sysdep\os\win\wseh.cpp @ 365]
0012fff0 00000000 kernel32!BaseProcessStart+0x23
Installing the vcredist _does_ work. The game actually does run nicely on XP, and I was able to connect to the lobby after adding TLS 1.1/1.2 support via a Windows update.