Diablo IV
Early patches saw duplication methods involving trading, server rollback timing, or stash interactions that created duplicate gold and items. Blizzard repeatedly disabled trading to contain such issues.
Vendor, reroll, or trade-related bugs have periodically allowed players to generate or preserve far more gold than intended. These economy breaks distorted progression and markets.
Players quickly reset the highest-yield dungeons to repeatedly farm elite packs and experience at rates beyond intended variety. It was one of the game's earliest progression exploits.
Some bosses could be fought from terrain edges or geometry pockets that reduced incoming damage or mechanic exposure. These spots were often patched once publicized.
Temporary buffs and skill interactions sometimes persisted longer than intended when players changed loadouts or action states. This let certain builds exceed their designed damage windows.