Obcidian.legacy.rar [ EXTENDED ]

The .rar extension indicates this is a compressed archive. Depending on where you found it, it could be:

It includes standard ARPG systems such as quest-driven progression, talent trees, equipment upgrades at a blacksmith, and socketed gems to enhance gear. Obcidian.Legacy.rar

An archived version of the game client or assets. equipment upgrades at a blacksmith