
Grey Hack
Grey Hack is a massively multiplayer hacking sim on a shared network that keeps running while you are offline.
If hackmud left you wanting something funny and replayable, you have options. Browse these co-op games for your next favorite. Plenty here let you team up if you like.
Grey Hack is a massively multiplayer hacking sim on a shared network that keeps running while you are offline. Team up with co-op friends in a guild, pool money and servers, or hack each other and cover your tracks. Every command is code you can read and rewrite.
Replayable
Reveal company secrets while hacking and exploring their quantum simulation networks. Fights for control with other players, coop with your faction, gather best tools, build most secure servers, write scripts and webs, or choose to be solo hacker who makes the right choices to change the world.
Replayable, Mysterious
An indie MMORPG where your JavaScript does the grinding. Run up to 4 characters at once, party up with real players for cooperative bosses and events, trade loot, or try PvP. Start from working default code and teach your party to heal, kite, and farm while you watch.
Retro
BatMUD is a text-based medieval fantasy online game running since 1990, with hundreds of zones, dozens of guilds and a long list of races, spells and skills.
Replayable, Retro
NITE Team 4 is a military hacking simulation with more than 70 missions about cyberwarfare. For co-op friends who like solving puzzles together, it gives you terminals, clues, and cases to talk through as one elite unit tracking suspects and breaking into networks.
Replayable, Mysterious
A text-based idle MMORPG about hacking, built for co-op friends who like progressing together. Join or start a Syndicate, share resources, trade crafted gear, and team up for daily world boss fights where some hack and others keep the push going.
Replayable
Hack greedy megacorps to help as many people as you can in a high-agility cyberpunk looter/shooter RPG. Explore neon cyberspace vistas and outmaneuver AIs to customize your hacker OS and weapon combos. Play solo or online co-op with up to 10 people!
Replayable, Mysterious
CYBERLIFE is a complex, terminal-based multiplayer hacking game set in a persistent, shared world. Explore a fictional network with its own commands, infiltrate companies, extract valuable data, and take control of the routes other players depend on.
Replayable, Mysterious
Hack Protocol is a multiplayer hacking sim where you build software, breach servers, steal data, upgrade your hardware, and cover your tracks. Play solo against NPCs but watch out for other players to compete with other hackers. Clean your logs!
Replayable, Retro
Sneak into dark office buildings with up to three co-op friends, hack computers, grab loot, and get out before the entity finds you. Simple jobs turn tense fast, and there is always another drawer to search or camera to check.
Replayable, Mysterious
Two windows applications install to any Windows Computer: Ansi compliant telnet text MUD Server and Client and their VB6 source code, heavily SQL coded with support and admin commands. I run my server on a 1000Mhz x 2 processor 7nm HP fanless laptop.
Funny, Replayable, Mysterious
A fan-made take on Sburb from Homestuck, built for messing up the universe together. You start a session solo or open a lobby for co-op friends, climb gates, clear dungeons, fight enemies and bosses, and fuse loot into strange new gear.
Funny, Replayable

Grey Hack is a massively multiplayer hacking sim on a shared network that keeps running while you are offline.

Reveal company secrets while hacking and exploring their quantum simulation networks.

An indie MMORPG where your JavaScript does the grinding. Run up to 4 characters at once, party up with real players for cooperative bosses and…

BatMUD is a text-based medieval fantasy online game running since 1990, with hundreds of zones, dozens of guilds and a long list of races, spells…

CYBERLIFE is a complex, terminal-based multiplayer hacking game set in a persistent, shared world.

Hack Protocol is a multiplayer hacking sim where you build software, breach servers, steal data, upgrade your hardware, and cover your tracks.

Sneak into dark office buildings with up to three co-op friends, hack computers, grab loot, and get out before the entity finds you.
In a dark cyberpunk war against the Federation, you and up to 3 co-op friends fight as cyber-enhanced warrior-monks of E.Y.E.

A first-person homeless crime sandbox where you and your co-op friends scrape by, get drunk, hallucinate, and take on rival crews.

Out of jail and already in debt to the stranger who paid your bail.

Run a scam call center with co-op friends, talk fast-talking AI callers out of their savings, hack their computers for leverage, and hit the daily…

Wake with no memory. Descend 100 dungeon floors. Build relationships, start a family, lose companions forever.

Sneak into dark office buildings with up to three co-op friends, hack computers, grab loot, and get out before the entity finds you.

An indie MMORPG where your JavaScript does the grinding. Run up to 4 characters at once, party up with real players for cooperative bosses and…

A text-based idle MMORPG about hacking, built for co-op friends who like progressing together.

Born Again is a pixel-art hack-and-slash where you and co-op friends roam an open realm as ronin, cut through monsters and Overlords, and grab loot…

An indie Online RPG game set in an open world from a solo developer.

The mayor of Rockhaven threw you down a hole into the Undercity. Why? Net worth too low.

Out of jail and already in debt to the stranger who paid your bail.

Run a scam call center with co-op friends, talk fast-talking AI callers out of their savings, hack their computers for leverage, and hit the daily…

A fan-made take on Sburb from Homestuck, built for messing up the universe together.

A blocky city sandbox built for roleplay and chaos with co-op friends.

Mist Legacy is a slow, top-down fantasy RPG with turn-based fights where skills decide everything.

NITE Team 4 is a military hacking simulation with more than 70 missions about cyberwarfare.

CYBERLIFE is a complex, terminal-based multiplayer hacking game set in a persistent, shared world.

Hack Protocol is a multiplayer hacking sim where you build software, breach servers, steal data, upgrade your hardware, and cover your tracks.

Enjoy an old school text adventure game where your imagination is more important than your video card.

Run a scam call center with co-op friends, talk fast-talking AI callers out of their savings, hack their computers for leverage, and hit the daily…

An indie MMORPG where your JavaScript does the grinding. Run up to 4 characters at once, party up with real players for cooperative bosses and…

You're the last remaining video rental store. From humble VHS clerk to rental racketeer - run your video store and explore Reshoot Springs, building…

Wake with no memory. Descend 100 dungeon floors. Build relationships, start a family, lose companions forever.

Dive into a fast paced, text based ARPG experience that fuses classic adventure with modern action-packed gameplay.

A text-based idle MMORPG about hacking, built for co-op friends who like progressing together.

An indie Online RPG game set in an open world from a solo developer.

Sneak into dark office buildings with up to three co-op friends, hack computers, grab loot, and get out before the entity finds you.

Out of jail and already in debt to the stranger who paid your bail.