Kingdom Come: Deliverance - Treasures of the Past Review (Draco4472)
Originally a pre-order bonus made available at large, all this DLC does is provide maps to already-existing locked chests in the world which were previously unmarked outside of wikis, and places in them components of a unique set of armor - some pieces of which are the best in the category in certain stats compared to others across the base game and additions from other DLCs, though otherwise aimed at mid-game use - though requiring considerable investment in your Lockpicking skill to actually access what you're paying for.
Excellent way of supporting Warhorse Studios further, aside from buying KCD II, and shoring up your early-game capabilities via access to some of the easier to unlock chests nearer to where you're deposited in the world after the tutorial sequence.