https://www.pcgamer.com/a-steam-game-was-being-used-to-scam-people-with-fake-dota-2-items/

An awful-looking game called Climber recently vanished from Steam after several Dota 2 players reported they'd been scammed by Climber users pawning lookalike items.

The scam revolved around a Dota 2 item called the Dragonclaw Hook. The genuine Dragonclaw Hook is an immortal-rarity item for the hero Pudge. It was briefly available in early 2013 and can no longer be obtained outside of the Steam Community Market, where it can fetch upwards of $800.