Most mods require you to copy an (data) folder into Android/obb/com.ChimpWorks.SteelAndFlesh2 . If the modder provides a separate OBB file, follow their instructions exactly. Otherwise, the game may crash on launch.
Disclaimer: Modifying game files may violate terms of service. Always ensure you are downloading from reputable community sources and back up your original game data. download steel and flesh 2 mod apk max level