Game Informer (GI) is an American-based monthly magazine featuring articles, news, strategy, and reviews of popular video games and associated consoles. Formed in August 1991, the magazine has nearly 3 million subscribers according to Andrew Reiner, making it the highest circulated video game magazine, and as of the first quarter of 2009, it is listed as the 12th largest overall magazine. Game Informer is now ranked among the top four magazines for reaching males 18 to 34.

It is owned and published by GameStop Corp., the parent company of the video game retailer of the same name. Due to this, a large amount of promotion is done in-store, which has contributed heavily to its large subscription base, especially as a subscription is included with the store's Gamer's Edge discount card.

Game Informer saw a complete redesign of both its magazine and website in November 2009.