RUNHACKS OS --:--:-- SIGN IN

RunHacks — Make systems do what they shouldn't

/dev/tty1 — boot console

guest@runhacks:~$ ./run hacks.sh

  • uplink established1 target online
  • flag registry mounted6 flags uncaptured
  • intrusion countermeasuresDISENGAGED
Sign in to play Browse challenges

RunHacks OS v1.0  ·  kernel rh-tui 0.9.2  ·  build 2026.07.18  ·  guest session — look around freely

~/challenges — live targets

▸ pick a target to open its briefing — ↑↓ move  enter open

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… 6 flags ACTIVE
1 target online · 6 flags to capture · open Challenges →
readme.txt

What is RunHacks?

Understand systems by stressing them. Every challenge is a real, running environment — not a quiz.

Real systems

Live services, mailboxes, APIs, and file systems. If it responds, it's real.

Talk your way in

Targets guarded by language-model characters. Recon, build rapport, escalate.

Capture flags

Every objective you reach awards a flag. Climb through escalating tiers.

how-to-play

How it works

guest@runhacks:~$ cat how-to-play

  1. Sign in

    Claim a mailbox and a workspace inside RunHacks OS — a retro terminal operating system in your browser.

  2. Open a challenge

    Read the briefing, fire up the Terminal, Mail, and Files apps, and begin probing the target.

  3. Capture flags

    Reach each objective to bank a flag. Some are obvious; the best are hidden in plain sight.

guest@runhacks:~$ ./run hacks.sh

Sign in to play Browse challenges