# pond3r/ggpo

Good Game, Peace Out Rollback Network SDK

Repository: https://github.com/pond3r/ggpo
Canonical: https://ross.abutalabs.com/products/ggpo
Language: C++
License: MIT
License Family: permissive
Last push: 2024-06-26T13:59:55+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 2526, "days_push": 798, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3578, forks 405 (observed 2026-08-28T04:08:10.868033+00:00)

## What it is
GGPO is a C++ SDK that implements rollback networking, using input prediction and speculative execution to give online multiplayer games the feel of zero-latency play. It ships as a library with documentation and a sample Vector War application for integrating rollback into new or existing games.

## Use cases
- add rollback netcode to a fighting game
- make online multiplayer feel like offline play
- implement input prediction and rollback for a real-time game
- synchronize game state across two or more clients with low latency
- learn how rollback networking works
- replace input-delay networking with rollback in an existing game

## When to choose
- you are building a 2-4 player real-time game (especially fighting games) that needs responsive online play
- you want the industry-standard rollback SDK proven in shipped games
- you develop on Windows with Visual Studio and CMake

## When to avoid
- you need turn-based or non-real-time multiplayer
- your game cannot be made deterministic or rewound (e.g., heavy physics or non-deterministic simulation)
- you require first-class Linux/macOS build support today
- you need a maintained project with active development

## Facets
- artifact type: library
- maturity: maintenance
- function: sdk, networking, simulation, game-engine
- domain: networking
- platform: windows, cpp, cross-platform
- tags: rollback-netcode, ggpo, fighting-games, input-prediction, multiplayer, game-development, real-time

## Member repositories
- pond3r/ggpo (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:10.868033+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:34:01.714707+00:00, confidence not recorded.
  - readme: https://github.com/pond3r/ggpo (fetched 2026-08-28T04:08:10.868033+00:00, sha e73550cea6bb)
- Data as of 2026-08-30T08:39:29.467469+00:00.