Does Realm VTT support Sanity mechanics for Call of Cthulhu?

Yes. The CoC 7e ruleset includes full Sanity tracking with automated SAN checks — the Keeper selects a loss formula (e.g., 1/1D6), the system rolls the check and deducts SAN automatically. Max SAN decreases as Cthulhu Mythos skill increases (Max SAN = 99 − Cthulhu Mythos). Temporary and indefinite insanity states are tracked on the character sheet.

How do I set up a Call of Cthulhu campaign on Realm VTT?

Sign up for a free Realm VTT account, create a new campaign, and select the Call of Cthulhu 7th Edition ruleset. The ruleset provides character sheets, skill rolls, Sanity tracking, and the tools you need to run investigations.

Can I import my own maps and content?

Yes! Upload your own static or animated maps, or import Universal VTT (UVTT) files from popular map-making tools. You can also create your own tokens, import custom icons, and enter homebrew content like custom creatures and scenarios.

Play Call of Cthulhu Online — Free Virtual Tabletop

Run your Call of Cthulhu 7th Edition campaigns on Realm VTT — the free virtual tabletop with a dedicated CoC 7e ruleset, animated battle maps, dynamic lighting, and fog of war built for horror investigations.

Realm VTT's CoC 7e ruleset includes automated d100 roll-under mechanics with Regular, Hard, Extreme, and Critical success levels, pushed rolls with Luck spending, Sanity checks with automatic SAN loss, opposed melee combat with Fight Back and Dodge, firearm mechanics with ammo tracking and malfunction, and skill improvement rolls at end of session. No subscription required.

Cosmic horror demands atmosphere. Upload animated maps with flickering candlelight, drifting fog, and rain-soaked streets. Dynamic lighting and fog of war bring your investigations to life — dimly lit mansions, claustrophobic tunnels, and fog-shrouded graveyards all rendered with real-time line-of-sight. Free for every campaign.

Start Playing Free

Top 5 Reasons to Play Call of Cthulhu on Realm VTT

Dedicated CoC 7e Ruleset

Purpose-built Call of Cthulhu 7th Edition ruleset with automated d100 roll-under mechanics, Sanity checks with automatic SAN loss, opposed melee combat with Fight Back and Dodge, firearm combat with ammo tracking, pushed rolls, Luck spending, and skill improvement rolls.

Free Dynamic Lighting & Fog of War

Dynamic lighting and fog of war are free for every campaign — perfect for dimly lit mansions, fog-shrouded graveyards, and claustrophobic tunnels. On Roll20, the GM needs a paid subscription ($5.99+/month) just to enable dynamic lighting.

Animated Maps for Horror Atmosphere

Upload animated maps with flickering candlelight, drifting fog, and rain-soaked streets. Native animated scene support with auto-detected attack animations brings your investigations to life. Import Universal VTT files with walls and lighting pre-configured.

Generous Free Tier

Realm VTT's free tier includes dynamic lighting, animated maps, and the full CoC 7e ruleset — features other platforms charge for. Just sign up, create a campaign, and invite your investigators.

Custom Ruleset Editor

Extend the CoC 7e ruleset with the custom ruleset editor — add homebrew Mythos creatures, custom skills, new occupations, or house rules. Create your own item types, spells, and NPC stat blocks. Free on Realm VTT, paid on Roll20.

Realm VTT vs Roll20: Playing Call of Cthulhu Online

Dynamic Lighting

Realm VTT: Free for every campaign. Real-time shadows and line-of-sight — perfect for dimly lit mansions, foggy graveyards, and claustrophobic tunnels.

Roll20: Requires Plus or Pro subscription ($5.99+/month). Free-tier CoC games have no dynamic lighting.

Battle Maps

Realm VTT: Animated maps with flickering candles, drifting fog, and environmental effects. Native UVTT import with walls and lighting pre-configured.

Roll20: Limited animated map support. No native UVTT import — maps lose wall and lighting data.

CoC 7e Rules

Realm VTT: Dedicated ruleset with d100 roll-under mechanics, Sanity checks, opposed melee combat, pushed rolls, Luck spending, skill improvement, and NPC stat blocks with auto-animation.

Roll20: Official character sheet available, but dynamic lighting and fog of war require a paid subscription ($5.99+/month).

Ruleset Editor

Realm VTT: Custom ruleset editor included free. Add homebrew creatures, custom skills, new occupations, and house rules.

Roll20: Custom character sheet editing requires paid Pro subscription ($9.99/month).

Token Creator

Realm VTT: Built-in token creation tool. Make custom tokens from any image — no external tools needed.

Roll20: No built-in token creator. Requires third-party tools or marketplace purchases.

Pricing

Realm VTT: Generous free tier with dynamic lighting, animated maps, and the full CoC 7e ruleset included.

Roll20: Free tier with limited features. Plus ($5.99/mo) and Pro ($9.99/mo) tiers for full access.

Feature	Realm VTT	Roll20
Dynamic Lighting	Free for every campaign. Real-time shadows and line-of-sight — perfect for dimly lit mansions, foggy graveyards, and claustrophobic tunnels.	Requires Plus or Pro subscription ($5.99+/month). Free-tier CoC games have no dynamic lighting.
Battle Maps	Animated maps with flickering candles, drifting fog, and environmental effects. Native UVTT import with walls and lighting pre-configured.	Limited animated map support. No native UVTT import — maps lose wall and lighting data.
CoC 7e Rules	Dedicated ruleset with d100 roll-under mechanics, Sanity checks, opposed melee combat, pushed rolls, Luck spending, skill improvement, and NPC stat blocks with auto-animation.	Official character sheet available, but dynamic lighting and fog of war require a paid subscription ($5.99+/month).
Ruleset Editor	Custom ruleset editor included free. Add homebrew creatures, custom skills, new occupations, and house rules.	Custom character sheet editing requires paid Pro subscription ($9.99/month).
Token Creator	Built-in token creation tool. Make custom tokens from any image — no external tools needed.	No built-in token creator. Requires third-party tools or marketplace purchases.
Pricing	Generous free tier with dynamic lighting, animated maps, and the full CoC 7e ruleset included.	Free tier with limited features. Plus ($5.99/mo) and Pro ($9.99/mo) tiers for full access.

Frequently Asked Questions

Can I play Call of Cthulhu online with a virtual tabletop?

How does Sanity tracking work?

How does combat work in the CoC 7e ruleset?

How do I set up a Call of Cthulhu campaign?

Can I use my own maps for Call of Cthulhu?

Can I import my own content?