TTRPG Wiki

Compare tabletop RPG systems to find your next game

Heartbeats in Perfect Sync

Pulse-Pounding Edition
Ordinary people wield outlandish weapons against monsters born from negative emotion
View on itch.io →This page contains affiliate links. If you purchase through them, we may earn a small commission at no extra cost to you.
modernfantasy
AnimeCharacter-DrivenCinematicCollaborativeDramaFast-PacedRules-LightSuperpowersTag-BasedUrban Fantasy
✦ Indie Creator Submitted
Languages: English
Diced6 dice pool
System FamilyStandalone
Cost$
LicenseProprietary
PublisherNathan Blades
Year2024
Complexity Low
Accessibility Medium
Runnability Low

Core Mechanic

When an outcome is uncertain, the GM sets a target number of hits. Roll a d6 pool equal to your current Heart Rate; each 5 or 6 is a hit, and meeting or exceeding the target succeeds. Results can shift Heart Rate, changing the size of later pools.

Best For

Groups who want episodic urban-fantasy action centered on emotional escalation, relationship drama, and coordinated anime-style set pieces.

Highlights

Heart Rate serves as both the dice pool and an emotional track, so roll outcomes alter the odds of later actions. Perfect Sync lets characters with matching Heart Rates combine their pools for a shared roll at the cost of later spotlight turns. While Heartbroken, the altered-state aspect does not expire, and later thresholds lead to recovery or loss of player control.

Considerations

The default City is deliberately sparse, so groups build most setting detail themselves or begin from the included scenario. The GM decides uncertainty, target hits, and failed-roll consequences case by case. Under the base rules, Perfect Sync requires matching Heart Rates, though an optional Heartstring move can bypass that limit.

No verified publishing route found Reviewed 2026-08-27 · Summary only, not legal advice. Check current terms before publishing.