Pick a game idea
Start with a simple concept: an obby, tycoon, hangout, simulator, racing challenge, or something only you and your friends would invent.
Roblox online hackathon
Build Day
A 24-hour online hackathon where you turn the Roblox game idea you wish existed into an experience your friends can actually play.
Date
Oct. 10, 2026
Where
Online in Roblox Studio
Prize
Top 3 games win
What happens at Build Day
Learn the tools, build the first version, then publish a playable game.
Build in Roblox Studio
Follow creator workshops to learn maps, parts, scripts, checkpoints, spawns, effects, and the basics of making a game feel good.
Test with friends
Invite a small crew, watch where they laugh or get stuck, then improve the parts that make your game more fun to replay.
Submit to judges
Finish your playable build before the deadline. The top three games earn prizes for creativity, polish, and fun.
Why join
You already know what makes Roblox fun. Now make your own server for it.
Build Day is for players who have ever said, "Someone should make a game where..." Instead of waiting for that game to appear, you can learn the creator skills to make a version yourself.
Make a private hangout, challenge, or full game loop that your friends can jump into after the event.
How to join
Sign up in Discord, then show up ready to build for 24 hours.
Join the Roblox Developers Discord
Use the event invite, read the server rules, and make sure your Discord account is ready before Build Day starts.
Open Discord inviteFind the event channel
Go to the #build-day-hackathon event channel for announcements, sign-up instructions, team info, and submission rules.
Ask questions early
If you need help before the event, email the Build Day team at questions@buildday.example.