In April, Team Fortress 2 casual matchmaking fell victim to a “lag bot” invasion that forced a sudden, ugly spike in disconnections and server crashes. Shortly after it came to light, Valve released an update that seemed to fix the issue, and that was that—for awhile.

As Kotaku reported last week, a new type of bot, inflicting a new type of headache, had arrived on the TF2 scene: Spam bots, which were flooding the in-game chat with everything from generic trolling to all-out racism. The situation was serious enough to prompt some players to start a “TF2hackerpolice” subreddit to track and report bot activity.

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