A source code for Counter-Strike: Global Offensive has been leaked, but Valve is not concerned.

As revealed on Twitter (below), the American firm has reviewed the code and believes it to be a reposted engine code from 2017.

"We have reviewed the leaked code and believe it to be a reposting of a limited CS: GO engine code depot released to partners in late 2017, and originally leaked in 2018," said Valve.

"From this review, we have not found any reason for players to be alarmed or avoid the current builds."

However, one project – Creators.TF – has shut down for now over concerns surrounding the leaked code, as confirmed on Twitter.

"Due to the recent source code leak, we will be closing our servers for the foreseeable future. This is because of the uncertainty surrounding security of our infrastructure, as well as a potential for damage to be caused to your computer," said Creators.TF.

SteamDB operator Pavel Djunk also took to Twitter, he backed Valved and insisted that it would do "very little" to help cheat developers. However, Valve has claimed it will continue to look into the leaked code, though it does advise players to use official servers.

"We will continue to investigate the situation and will update news outlets and players if we find anything to prove otherwise. In the meantime, if anyone has more information about the leak, the Valve security page (next tweet) describes how best to report that information," said Valve.

Last month, Counter-Strike: Global Offensive hit one million concurrent players. The third time Valve's title broke its simultaneous user record this year.

We have reviewed the leaked code and believe it to be a reposting of a limited CS:GO engine code depot released to partners in late 2017, and originally leaked in 2018. From this review, we have not found any reason for players to be alarmed or avoid the current builds.

— CS:GO (@CSGO) April 22, 2020