steam and valve has also been generally more respectful with users than mostly any other online business, not even just in the space of online software stores. of course it’s not all rainbows and glitter but the point stands.
kills? most of them work with a steam emu, even offline. that’s not even cracking. most of those that don’t have a different limitation.
with a steam emu you can do whatever you want with the game files, often you can put it on your pendrive and play it as a portable game (the right goldberg emu settings allow game data to be stored near the game files instead of appdata)
https://tosdr.org/en/service/624