Make systems do what they shouldn't.adversarial challenges for devs
Agents can write your code.
They can't understand it for you.
You don't learn how a system really behaves from a quiz or a tutorial. You learn it by trying to break one.
So we built companies for you to break into.
Live mail servers, APIs, and file systems — staffed by AI employees with jobs, moods, and access. Charm them, pressure them, fool them.
▸ now playing
Open House
You're a newly-onboarded recon operator at GreyFern, a private intelligence firm. A client has retained the firm for a pre-engagement recon package…
Open briefing →next drop in staging — Hacker members play early
How it works
Recon a live target
Real mail servers, APIs, and file systems. Anything you can reach, you can probe.
Social-engineer the staff
AI characters with jobs, moods, and access. Earn their trust or exploit it.
Capture the flags
Every objective you reach banks a flag. The best ones take real tradecraft.
Pick your clearance.
Guest
$0
- Play each new challenge when it goes live
- Your own mailbox and workspace in RunHacks OS
- Every standard flag, no card required
Hacker
$8/mo
- All RunHacks challenges, past drops included
- Early access to new challenges
- Exclusive premium challenges
- Hacker role + channel on the Smarter Dev Discord
Billed through Smarter Dev. Sign in here with the same account and everything unlocks.