massively multiplayer hacking sim

BREACHMMO

Two teams. One living network. The red team tries to break in. The blue team tries to keep them out. And the system between them — firewalls, intrusion monitors, dead-end traps — starts thinking for itself.

Cooperative intrusion · emergent security AI · faction territory · a CTF campaign · free in your browser

ENTER THE NET → SUPPORT THE STUDIO
v2.9.5 · LIVE

pick a side

Attack. Defend. Or watch the middle decide.

There's an affinity quiz if you can't decide — but the network doesn't care which one you are. It just has a budget, a wall, and a grudge.

RED TEAM

Exploit · Infiltrate · Dominate

You come in through the cracks.

  • Deploy SQL injection, port scans, password spray
  • Chain exploits across a live, multi-player network
  • Reach the core. Hold it. Make it yours
  • Real CVE intel feeds the challenge set
BLUE TEAM

Detect · Defend · Remediate

You're the reason they can't.

  • Stand up network defense, WAF and IDS panels
  • Read the SIEM, track the attacker, cut them off
  • Remediate before the next wave hits
  • Security-event monitor, cert-readiness tracker

the third player

The network fights back.

This isn't a static map with a scoreboard. Security systems are emergent — they watch what the red team does, adapt their rules, and start setting traps of their own. A door you breached last match may be sealed this one. A patch you thought held may be the one that's watching you.

So the question isn't just "can you break in?" It's "what counts as trespassing when the doors think for themselves?"

A glowing firewall barrier of hexagonal code plates, cracked in the middle with red light bleeding through, in a dark server room

the lair

Upgrade your hub, spend compute budget, and grow your faction's footprint on the live territory map.

the campaign

A 23-challenge CTF path with real writeups — learn the craft while you learn the net.

what's in the net

Built for the craft.

01

Red / Blue Matchmaking

Jump into a running match on either side. Not sure which? Take the affinity quiz — it just suggests a start, it doesn't lock you in.

02

CVE Intel

Challenges are seeded from real, sanitized CVE data. The exploit you're chaining today was a real bug.

03

CTF Campaign

A 23-challenge path from first scan to full compromise, with writeups. Single-player, at your own pace.

04

Faction Territory

A live map of what each side holds. Push, hold, reclaim. The net remembers who owned what, where.

05

The Lair

Build and upgrade your hub. Compute budget is a resource — spend it on tools, defenses, or blind spots you leave in the wall.

06

Emergent Security

The defense layer adapts to your behavior. Every match's net is shaped by everything that came before it.

see it running

The front door.

BREACH.MMO live join screen: the green BREACH logo over a black terminal, with Join Red Team and Join Blue Team panels and a controls legend
Live from the running v2.9.5 build. Pick a side, read the controls, and you're on the net in under a minute. Free to play — pay what you want.

Ready to break in?

No download. No account wall to climb first. Just a net, a wall, and a grudge.

ENTER THE NET → SUPPORT $1+

BREACH.MMO is a research project of The Multiverse School. Open source, pay what you can. The net is the same regardless.