You might see mods for version 1950, 2000, or 2100. So why does 1938 have a cult following?
Ironically, the mod ruins the game. Shadow Fight 2 is famous for its physics-based difficulty and timing. When you have "Max Level" and "One-Hit Kill" active, there is no strategy left. You beat Titan in 10 seconds, and then... you close the app. It kills the fun.
"Don't bother. I installed it and got a pop-up ad every 10 seconds. Plus, the 'max level' is just visual. The enemies scale to your level, so it's still hard. That's not how the game works!" –