"We always said we'd be delighted with 20,000 sales, so this number means a lot to us as do as all the wonderful emails and tweets," tweeted Jessica Curry, the co-director of studio Thechineseroom, which developed the game.
"Thank you so much to everyone for the support," she wrote. "Amazing."
Humble Bundle 8, which also includes indie titles like Little Inferno and Thomas Was Alone, lasts for roughly four more days. Over 400,000 bundles have been sold so far, with over $2 million raised in funds. Once more, Markus "Notch" Persson — the creator of Minecraft — is the top contributor.