Mob Trader turns dungeon-themed collecting into a low-key routine: poke the dungeon, then wait for a mob to arrive as a tradeable Steam Item. Its appeal rests on accumulating distinctive creatures rather than battling through the dungeon. The game is listed as single-player, while its collection has a social and economic outlet through trading with other players on the Steam Market.
A drop arrives every 60 minutes, with the listed odds strongly favoring common mobs over rare and mythical ones. The selection also changes on a weekly cycle: a randomly chosen roster becomes active, while new common and rare mobs enter an item shop until selected as active drops. This combination makes collection a matter of both timed chances and keeping track of which items are currently in rotation.
Trading connects collectors beyond the single-player category, but the core described loop is waiting for drops, building a collection, and deciding what to show or trade. The store also describes inventory viewing and exchanges for additional rolls as features in development, so they should not be treated as established parts of the current gameplay.