These mods inaccurately report the contents of a player's inventory and/or matchmaking status

Why? Here's Valve: These mods inaccurately report the contents of a player's inventory and/or matchmaking status, devaluing both and potentially creating a confusing experience for players. You can understand Valve wanting to clamp down on falsified profile ranks and scoreboards. It's the bit about using items not in your inventory that's come under fire from CS: GO's legion of players.

CS: GO is one of the biggest first-person shooters in the world, with around 10m people playing per month. And community servers continue to prove immensely popular. Valve said over the csgo skins past month 3. 1m played on community servers - and the number grows each month.

While the wording of Valve's server guidelines have caused confusion (are new custom character models allowed or not? ), many players reckon it's the beginning of the end for popular CS: GO mods, such as zombies. Critics suggest Valve's clampdown is part of a bid to ensure the money generated by CS: GO's virtual economy continues to roll in, and have expressed disappointment that the company would restrict the modding of a game that began life as a Half-Life mod.