SteamKO error code table

Steam Knight Online login error codes
CodeMessageMeaningWhat to do
-18 New connection detected. Please visit the Steam KO website to verify your account. New PC/network check Verify by email code under GAME SERVICE on the site
-8 (-9) Blocked user info is being used / Blocked the your computer. PC or connection blocked Check the -18 verification first, then open a ticket
-95 VPN or proxy connections are currently not permitted. Please try again via your local connection. VPN/proxy not allowed Turn the VPN off and use your home connection
-99 We cannot find your steam information. Please try again after steam client logout. The game couldn't read your Steam account Log out of Steam and back in, launch from the library
-31 We cannot found the User information. Account info couldn't be fetched (brief) Wait a few minutes and retry
(0) Disconnected From Server (0) / Error Code (0) Server problem when connecting Wait for the announcement; don't log out if you're in
(255) Successfully connected to ZION1 server but failed logging into the game. Server reached, game login failed Wait a few minutes; if it's widespread, wait for news
10060 / 10061 Failed logging into the Login Server. Login server unreachable / refused Connection steps
— Connection failed. There is an error in the selected server. Second account from the same network The second account needs premium

What does -8 Blocked your computer mean?

-8 says your PC or connection has been blocked. According to NTTGame's team, the block kicks in when many accounts connect from the same PC. Check the connection verification first with SteamKO error -18 (New connection detected); if the block stays, open a support ticket with your character name, server and the error text. Players report the block being lifted within 1–3 days.

-95 VPN or proxy error

NTTGame bans connecting to the Steam servers through a VPN or proxy. Players also get this warning on phone hotspots, some mobile and corporate networks and internet cafes. Turn the VPN off and use your home connection; if it shows up on your own home line, open a ticket with your character name and server.

-99 Steam information not found

If the game can't read your Steam account, it drops back to the desktop after START or shows -99. As the message says, log out of Steam and back in, and launch the game from your Steam library rather than a desktop shortcut. If it persists, restart Steam and verify the game files.

(0) and (255): server-side errors

(0) and (255) usually hit everyone at once. NTTGame's team said on July 26, 2026 that Error Code (0) was a server problem when connecting to the game and that it had been fixed; in 2017 the (255) error on the Cypher server was also fixed on the server side. If you see these codes, don't touch your settings, and don't log out if you're in the game: people who leave can't get back in until it's fixed.

There is an error in the selected server

According to NTTGame's team, this message appears when you try to log in a second account from the same IP. To play two accounts from one network, one of them needs premium; log in the non-premium account first. If you get it with a single account, clear browser cookies, restart the modem and PC, and relaunch the game from Steam.

FAQ

How do I fix SteamKO error 0?
It's usually server-side, so you have to wait for NTTGame to fix it. Don't log out if you're in; if you're not, follow the announcements.
Why does Knight Online show error -95?
Your connection looks like a VPN or proxy. Turn the VPN off; if you're on a hotspot, try your home network.
Can two people play SteamKO from the same home?
Yes, if one of the accounts has premium. Otherwise the second account gets "error in the selected server".
How long does the -8 block last?
NTTGame hasn't given a duration. Support lifts it through a ticket; players say it was cleared within 1–3 days.

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