Chaosium's flagship horror RPG is half a century old this year, and the 50th Anniversary Slipcase Set finally lands in UK shops on 29 April 2026. Forbidden Planet is leading the British retail rollout, with pre-orders at £87 against a £105 RRP. That is roughly a 17% saving, not a steal, but it is the first time UK Cthulhu fans can grab the anniversary edition without fishing it across the Atlantic.
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See how it worksInside the slipcase you get the full 7th Edition triple play: the Keeper Rulebook, the Investigator Handbook and the Keeper Screen Pack. That covers character creation rules, 100+ occupations, the full Sanity system, two ready-to-play scenarios in the Screen Pack, and a 34-inch reference screen. New cover art comes from Swedish illustrator Ola Larsson, the only meaningful change from the standard 7e books. No anniversary retrospective, no Greg Stafford history booklet, no fresh mechanical content. This is a presentation upgrade aimed at collectors and gift buyers.
One wrinkle for British shoppers. Buying direct from Chaosium normally bundles the PDF free with the physical books, but UK retail purchases generally do not. If you want both, you might be better off paying the higher RRP at Chaosium's site.
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Start organising for freeCall of Cthulhu turns 50 this year, and the system has shaped pretty much every horror RPG that came after it (Trail of Cthulhu and Delta Green wear the influence on their sleeves). This slipcase is the closest thing to an "official" anniversary product Chaosium has put out. If you have been meaning to run a Lovecraft campaign, the moment is here. Round up your group, grab a slipcase, find a horror-friendly RPG community, and lean into it.
Sources: Geek Native | Chaosium | Forbidden Planet
