Every Saturday at 20:00 UTC

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
Mud Cake by posho Mud Cake
for 1 Hour Game Jam 171 (Four elements)

Use the four elements to bake a delicious mud cake!

Stacker by posho Stacker
for 1 Hour Game Jam 69 (One button)

Just Stacker.

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