Last week, famous hat-collection game Team Fortress 2 suffered from an influx of Unusual hats. These particular cosmetics drop rarely in TF2 s loot boxes, and are equipped with particle effects, making your Scout or Pyro or whoever look especially fancy. They re also big-ticket items in the Steam trading economy. Or, they were, until a glitch meant they were guaranteed to appear in certain loot boxes, creating a glut, pushing the price down, and generally causing havoc in the markets. Valve responded last night, apologising for the bug and outlining how they re going to attempt to minimise the economic effect.

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