Donkey Kong 64 is a 1999 platform game developed by Rare and published by Nintendo for the Nintendo 64. It is the first 3D game in the Donkey Kong series. As the gorilla Donkey Kong, the player explores themed levels to collect items and rescue his kidnapped friends from King K. Rool. The player completes minigames and puzzles as five playable Kong characters—each with their own special abilities—to receive bananas and other collectibles. In a separate multiplayer mode, up to four players can compete in deathmatch and last man standing games.
After developing the Donkey Kong Country trilogy for Super Nintendo (1994–1996), Rare began working on Donkey Kong 64 in 1997, although production restarted halfway through the three-year development cycle. A 16-person team, with many recruits from Rare's Banjo group, finished it in 1999. It was published by Nintendo in North America in November and worldwide in December. It was the first game to require the Nintendo 64 Expansion Pak, an accessory that added memory resources. The US$22 million marketing campaign included advertisements, sweepstakes, and a national tour.
Donkey Kong 64 received universal acclaim and was Nintendo's top seller during the 1999 holiday season, with 2.3 million units sold by 2004. It won the 1999 E3 Game Critics award for Best Platform Game, and multiple awards and nominations from magazines. Reviewers praised the exceptional size and length, but criticized its camera controls and emphasis on item collection and backtracking. Some cited its similarity in gameplay and visuals to Rare's 1998 predecessor, Banjo-Kazooie (1998). Critics said it did not match the revolutionary impact of Donkey Kong Country, but was still among the Nintendo 64's best 3D platform games.
Donkey Kong 64 was Rare's final Donkey Kong game prior to its acquisition by Microsoft in 2002. Retrospective reviews of Donkey Kong 64 were mixed; critics considered it emblematic of the tedium in Rare's "collect-a-thon" adventure platformers. Donkey Kong 64 was rereleased on Nintendo's Wii U Virtual Console in 2015.