ONE WORLD.
ONE LOCK.
NO OVERWRITES.
Games like Factorio, Valheim, and Satisfactory have one live world at a time. Whoever holds the lock uploads; everyone else downloads. Holder gone quiet? Locks expire on their own, and you can take over — with a warning, and a logbook entry so everyone knows.
PASS THE WORLD AROUND
LIKE A CARTRIDGE.
No host PC that has to stay on. No “who has the latest save?” Whoever wants to play grabs the lock, plays their session, then pushes the save back.
TAKE THE LOCK
Open the shared save and claim the lock. Everyone else’s cartridge flips to read-only while you hold it — they can still download and look, nobody can upload.
PLAY YOUR SESSION
Host the world from your own PC like normal. Auto-backup keeps filing versions while you play, so even the session itself has an undo button.
PUSH IT BACK
Release the lock and the latest version is what the next person downloads. Went quiet instead? Locks expire on their own, and a teammate can take over — with a warning, and a logbook entry.
BLAME THE RIGHT PERSON.
Everything anyone in your group does gets written down. Handy for co-op friends, modded servers, speedrun teams, and the classic “wait, who deleted that?”
NO MORE 24/7 BOX
YOU BARELY USE.
A dedicated server makes sense if twenty people are on it every night. For the average co-op group — four friends, a couple of evenings a week — you’re renting empty hours. Checkpoint64 covers the part you actually need (the world file, lock-passing, version history) for a one-time payment instead of a forever bill.
YOU PAY 24/7.
A rented co-op server is around €15 a month for the popular games — €180 a year, €900 over five. Billed whether anyone logged in this week or not.
IT SITS IDLE.
Four friends, two evenings a week, three hours each. That’s about six hours of play out of 168 in the week. Your dedi is empty for the other 96%.
PAY ONCE. DONE.
One Lifetime payment and the cloud holds the world. Whoever wants to play grabs the lock, plays, and pushes it back. No box to keep warm.
PLAY LIVE.
SKIP THE PORT FORWARD.
Some nights you want the world online with everyone in it at once. Run the game’s server on your own PC and Checkpoint Connect links your team’s copies of the app: directly when it can, through a relay when it can’t. No router settings, no rented box, and CGNAT stops mattering.
RUN YOUR SERVER
Start the game’s server on your PC like normal. Checkpoint64 shares a server that’s already running; it never starts one for you.
SHARE IT WITH THE TEAM
Pick the game in your team and hit Share server. Presets know the ports for Valheim, Palworld, Satisfactory, Minecraft and more; anything else, type them in.
TEAMMATES HIT JOIN
Everyone else sees Join in the team’s library. Their game connects to 127.0.0.1 as if the server were on their own PC, and Checkpoint64 does the rest.
- Team members only: our backend vouches for everyone who connects, and the host’s app lets in only your teammates. Read-only members and Patreon supporters can join too, always through the relay, so they never see your IP address
- UDP and TCP, so it covers Minecraft Java and Terraria as well as Valheim and Palworld
- On every plan
Pairs with the lock: back the world up when you log off, and the next person can take the lock and host it from their PC.
CO-OP QUESTIONS.
WHAT IF MY CO-OP PARTNER OVERWRITES MY UPLOAD?
DO I STILL NEED A DEDICATED SERVER?
CAN FRIENDS JOIN A SERVER ON MY PC WITHOUT PORT FORWARDING?
PICK YOUR
CART.
Free is actually free — not a seven-day trial. Lifetime is pay-once. Pro is for crews who save together. No charge per person.
CHECKPOINT64 2.0
IS OUT.
GRAB IT.
Free download, free plan included. Builds publish straight from GitHub — these buttons always point at the newest installer.
release notes & older builds: on GitHub