Out of curiosity, I installed Myth TFL on the following systems:
Compaq Presario CQ5110F Desktop
Windows 7 Home Premium SP1 32-bit
Athlon 7550 Dual-Core 2.5 GHz
3 GB RAM
NVIDIA GeForce 210 w/ 340.52 Driver
Dell Inspiron N5110 Laptop
Windows 7 Home Premium SP1 64-bit
Intel Core i3-2310M Dual-Core 2.10 GHz
8 GB RAM
Intel HD 3000 Graphics Adapter w/ 8.15.10.2361 Driver
Gateway NE56R12u Laptop
Windows 8.1 Professional 64-bit
Intel B950 Pentium Dual-Core 2.1 GHz
8 GB RAM
Intel HD 2000 Graphics Adapter
I updated to Version 1.3 and then Version 1.5. I also set compatibility on the executable for Windows 98/Windows ME. I had no problem running the game in either Software or OpenGL mode, although OpenGL would not go full-screen (it appears to want to run in a 4x3 mode). The game even worked in Version 1.3 Software mode.
I didn't play extensively, but punkUser may be right about some aspects not working. You might check out the installer mentioned in this thread (if you don't mind living with Version 1.3):
http://tain.totalcodex.net/forum/viewto ... 774#p68200