In January 2014, the studio announced that it would work exclusively with Nintendo from then on. In that same interview, co-founder Jason Carr and producer Ken Yeeloy revealed that it was Nintendo who approached Next Level Games in the first place to develop Super Mario Strikers for the GameCube due to much of the team's prior work on Sega Soccer Slam at EA Black Box.
In January 2021, Nintendo announced that it had purchased Next Level Games after "A number of owner-directors recently determined that the time is right for them to sell their shares, and NLG therefore began exploring potential sale transactions". According to Nintendo's 2021 annual report, this acquisition took place on March 31st, 2021. Co-founder Tronsgard would later retire from the studio by March 2022.
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Phillips, Tom (July 17, 2019). "Luigi's Mansion 3 gets the spookiest release date possible". Eurogamer. Retrieved July 27, 2019. https://www.eurogamer.net/articles/2019-07-17-luigis-mansion-3-gets-the-spookiest-release-date-possible
Phillips, Tom (January 9, 2014). "Luigi's Mansion 2 dev will now work exclusively with Nintendo". Eurogamer. Gamer Network. Retrieved January 9, 2014. http://www.eurogamer.net/articles/2014-01-09-luigis-mansion-2-dev-will-now-work-exclusively-with-nintendo
"Luigi's Mansion: Dark Moon developer Next Level Games signs second-party deal with Nintendo". ScrewAttack.com. January 9, 2014. Archived from the original on October 9, 2015. Retrieved August 28, 2015. https://web.archive.org/web/20151009173615/http://www.screwattack.com/news/luigis-mansion-dark-moon-developer-next-level-games-signs-second-party-deal-nintendo
Nutt, Christian (January 8, 2014). "Working with Nintendo, making a studio great for developers". Game Developer. Retrieved January 10, 2025. https://www.gamedeveloper.com/business/working-with-nintendo-making-a-studio-great-for-developers
McFerran, Damien (January 5, 2021). "Nintendo Is Buying Luigi's Mansion Studio Next Level Games". Nintendo Life. Retrieved January 5, 2021. https://www.nintendolife.com/news/2021/01/nintendo_is_buying_luigis_mansion_studio_next_level_games
"Annual Report 2021 (page 54)" (PDF). Nintendo Co., Ltd. : Investor Relations Information. July 19, 2021. Retrieved January 11, 2025. https://www.nintendo.co.jp/ir/pdf/2021/annual2103e.pdf
Doolan, Liam (March 4, 2022). "Co-Founder Of Nintendo-Owned Studio Next Level Games Announces Retirement". Nintendo Life. Retrieved January 10, 2025. https://www.nintendolife.com/news/2022/03/co-founder-of-nintendo-owned-studio-next-level-games-announces-retirement
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"Tom's guide to Microsoft Solitaire Collection". July 29, 2020. https://www.tomsguide.com/how-to/how-to-download-microsoft-solitaire-collection
"Next Level Games was working on a WWE game that was cancelled by publisher THQ". Unseen64.net. February 18, 2012. https://www.unseen64.net/2012/02/18/wwe-titans-parts-unknown-ps2-xbox-cancelled/
"Super Mario Spikers is a cancelled volleyball/wrestling hybrid game developed by Next Level Games". Unseen64.net. August 6, 2011. https://www.unseen64.net/2011/08/06/super-mario-spikers-wii-prototype/
"Next Level Games was working on an Action title known as "Catalyst"". Unseen64.net. July 12, 2010. https://www.unseen64.net/2010/07/12/catalyst-xbox-360-ps3-pitch-cancelled/
"Next Level Games Was Working on a Puzzle-Platformer Called "Clockwerk"". Gamnesia.com. January 12, 2015. Archived from the original on September 24, 2015. Retrieved August 28, 2015. https://web.archive.org/web/20150924020713/http://www.gamnesia.com/news/next-level-games-was-working-on-a-puzzle-platformer-called-clockwerk/