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Best Free Online Superhero RPGs: Browser, Text & MMO Options

Yes! There are excellent free superhero RPGs across different playstyles. Here's a curated list by format.

📝 Narrative / Text-Based (Play-by-Post / Discord / Forum)

Hero Kids (Free Version): Simple d6 system for ages 4+. Great for families. herokids.com (PDF free; paid expansions).
Mutants & Masterminds (Free SRD): The full 3e rules free online. Play on Discord/Roll20. Green Ronin SRD.
Fate Accelerated Edition (FAE) – Free: Ultra-light, narrative-first. Perfect for supers. evilhat.com (Pay what you want = $0).
Savage Worlds (Test Drive Rules – Free): Fast, cinematic. Supers Companion is paid, but core works. Pinnacle.
Cortex Prime (Free SRD): Modular toolkit (used for Marvel Heroic Roleplay). cortexrpg.com.

🌐 Browser-Based / Lightweight Client

Superhero League of Hoboken: Classic 1994 DOS game, playable free in browser (Internet Archive). Turn-based, quirky humor.
Fallen London / Sunless Sea (Browser/Text): Not purely supers, but gothic Victorian powers. Deep narrative.
NationStates (with Superhero RP regions): Political sim; many regions run freeform superhero RPs on forums/Discord.

🎮 Full 3D MMOs (Free-to-Play)

City of Heroes (Homecoming / Rebirth / Thunderspy): The legendary 2004 MMO, revived by fans on private servers. Completely free, no sub, no P2W. Multiple servers: Homecoming (largest), Rebirth (hardcore), Thunderspy (custom content). Best authentic superhero MMO experience.
DC Universe Online: Official Daybreak MMO. F2P with optional sub. Action combat. Play as hero/villain alongside Batman, Joker, etc. dcuniverseonline.com.
Champions Online: Cryptic's older superhero MMO. F2P. Deep character creator. Smaller population.
Ship of Heroes (Upcoming): Spiritual successor to CoH. In beta; free planned.

🎲 Virtual Tabletops (Play TTRPGs Free Online)

Roll20 / Foundry (Self-hosted) / Owlbear Rodeo: Run Masks: A New Generation (free PDF), Worlds in Peril, or Supers! with friends.

How to Choose

Want...	Try This
Deep story, no graphics, flexible schedule	Masks / FAE / M&M on Discord/Roll20
Classic 3D MMO, huge world, zero cost	City of Heroes (Homecoming)
Official DC license, action combat	DC Universe Online
Kid-friendly, simple rules	Hero Kids (free PDF)
Tactical crunch, character builds	Savage Worlds / Cortex Prime

Start Tonight: Download Hero Kids (free) for kids, or register for City of Heroes Homecoming for the full MMO experience. Both are genuinely free and superb.

Online Games