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Every Saturday at 20:00 UTC
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Next jam:

Next week is the 200th One Hour Game Jam! Woo! Aaaand it clashes with Alakajam! So participate in whichever jam you wish, One Hour Game Jam will still be here the weekend after Alakajam after all :D
midnightas
Gravity-Flip by midnightas Gravity-Flip
for 1 Hour Game Jam 87 (Flip)

Left click to flip gravity. But watch out, there's a cooldown!

One Hour Game Jam is open-source, Get One Hour Game Jam software on GitHub.
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Established 2015