PC Gamer reviews are written by the magazine's editors and freelance writers, and rate games on a percent scale. In the UK edition, no game has yet been awarded more than 96% (Kerbal Space Program, Civilization II, Half-Life, Half-Life 2, Minecraft, Spelunky and Quake II). In the US edition, no game has yet received a rating higher than 98% (Sid Meier's Alpha Centauri, Half-Life 2, and Crysis).^{[citation needed]}

In the UK edition, the lowest numerical score was 2%, awarded to The 4th Golden Satellite Awards for Interactive Media Winner Big Brother 1. The sequel, Big Brother 2, was given an even lower score of N/A%, the review explaining that "[PC Gamer] put as much effort into reviewing it as they did in making the game". In issue 255, August 2013, the score of 2% was matched by the review of the re-released Leisure Suit Larry: Magna Cum Laude, originally given 3% when it first launched. In the US edition, the lowest score awarded was 4%, given to Mad Dog McCree, unseating the previously lowest-rated game, Skydive!, given 5%.^{[citation needed]}

There are two main editions of PC Gamer, a British version and an American version, both are published by Future plc. Founded in the United Kingdom in November 1993, the American sister version was launched a year later in June 1994.^[1]

There are also numerous local editions that mainly use the materials of one of the two editions, typically the British one, including a Malaysian (Discontinued in December 2011) and Russian edition. The Swedish edition, though rooted in its UK counterpart, has grown to be more independent, largely due to the immense popularity of PC games compared to console games in Sweden, and now produces most of its own material. An Australian edition was published monthly by Perth-based Conspiracy Publishing since August 1998, but it appears to have been discontinued in mid-late 2004. A Spanish edition titled "PC Juegos y Jugadores" also exists.^{[citation needed]}

Both American and British magazines are published thirteen times per year (twice in December),^[1] although there are sometimes variations.