Valve recently hosted the now-traditional Steam summer sale, during which it used the promotion to hide a kind of store ‘minigame’ for players. Essentially a time traveller called Clorthax tells you they’ve nicked ten games from the future and offers up riddles to help players find them. The sale’s over now and Clorthax has returned to their own time and place, which means Valve artist Claire Hummel could share all the cover art she mocked-up for the future games. HEYYY the Steam Summer Sale has concluded, so I can finally share all of the fake game art I got to make for it! 😎👍🏼The idea for this sale was to…