# Nucleus Co-op Wiki

> Nucleus Co-op Wiki is an independent English guide to downloading Nucleus Co-op for Windows, choosing game handlers, checking supported PC game setups, separating controllers, and troubleshooting split-screen workflows.

## Core Content
- [Nucleus Co-op download](https://nucleuscoop.wiki/download/): Checked installer and portable ZIP guidance with prerequisites, release-source links, and first-download steps.
- [Nucleus Co-op installation guide](https://nucleuscoop.wiki/install/): A clean Windows setup from application install through the first handler and controller test.
- [Nucleus Co-op games list](https://nucleuscoop.wiki/games/): A searchable directory of game-specific pages and handler-dependent compatibility notes.
- [Elden Ring Nightreign Nucleus Co-op guide](https://nucleuscoop.wiki/games/elden-ring-nightreign/): A Nightreign-specific handler and setup workflow covering build matching, input separation, connection limits, and Deep of Night saves.
- [Vampire Survivors Nucleus Co-op setup guide](https://nucleuscoop.wiki/games/vampire-survivors/): A game-specific workflow for handler checks, controller separation, co-op connection limits, saves, and troubleshooting.
- [Devil May Cry 5 Nucleus Co-op split-screen guide](https://nucleuscoop.wiki/games/devil-may-cry-5/): A cautious DMC5 setup test covering the community trainer and handler boundary, separate inputs, local multi-instance checks, and rollback notes.
- [Nucleus Co-op troubleshooting](https://nucleuscoop.wiki/troubleshooting/): Practical fixes for offline errors, OneDrive, access denied, ProtoInput, controllers, resolution, and launch failures.
- [Nucleus Co-op FAQ](https://nucleuscoop.wiki/faq/): Short answers about online play, Wi-Fi, safety, handlers, games, controllers, and saves.

## Common Resources
- [How Nucleus Co-op works](https://nucleuscoop.wiki/how-it-works/): Explains the relationship between the application, handlers, game instances, input separation, and connection limits.
- [Nucleus Co-op controllers](https://nucleuscoop.wiki/controllers/): Covers XInput, DirectInput, PS4, PS5, Joy-Con, keyboard, mouse, and shared-input symptoms.
- [Nucleus Co-op online and offline guide](https://nucleuscoop.wiki/online/): Separates local launch, Wi-Fi, LAN, online services, handler downloads, and firewall checks.
- [Is Nucleus Co-op safe?](https://nucleuscoop.wiki/is-nucleus-coop-safe/): Source-first download verification and cautious antivirus guidance.

## Latest Updates
- [Nucleus Co-op Wiki homepage](https://nucleuscoop.wiki/): Updated in August 2026 with the English download, setup, games, controller, online, safety, and FAQ information architecture.
- [Nucleus Co-op download guide](https://nucleuscoop.wiki/download/): Updated in August 2026 with the checked v2.4.1 installer and portable ZIP release facts recorded from the official release source.
- [Nucleus Co-op games list](https://nucleuscoop.wiki/games/): Updated in August 2026 with game-specific entry pages for Risk of Rain 2, Black Ops II, Minecraft Java, Palworld, Elden Ring Nightreign, and Vampire Survivors.
- [Devil May Cry 5 Nucleus Co-op guide](https://nucleuscoop.wiki/games/devil-may-cry-5/): Added in August 2026 with official Steam context media, a community-trainer compatibility boundary, and a controlled split-screen test workflow.