Company: Namco

Since the 1990's prior to the Bandai Namco corporate merger, Namco maintained a series timeline that retconned and merged many of their futuristic space games that were previously unrelated to each other into a single continuity. Tentatively called the "Galaxian Universe" timeline, it later came to be known as the "United Galaxy Space Force" timeline. As of 2025, the timeline connects together the plots of numerous games and series including (mostly in chronological order on the timeline) Ace Combat 3: Electrosphere, Cyber Sled & Cyber Commando, Burning Force, the Galaxian/Galaga series (including Namco's Wonder Eggs amusement park ride turned arcade game Galaxian3: Project Dragoon), the Bosconian series, Bounty Hounds, Starblade, NebulasRay, the Dig Dug series, the Baraduke series, the Mr. Driller series, Star Luster & Star Ixiom, Mizuiro Blood, the cancelled game "Starblade - Operation Blue Planet", Shin-Gun Destroy! Girl's Tank Battalion, the cancelled game "New Space Order", Shadow Labyrinth, and Thunder Ceptor & 3-D Thunder Ceptor II.

Hopping Mappy was the first Namco arcade game to allow scores not ending in 0.

Monolith Soft was originally owned by Namco, but their relationship took a negative turn after Masaya Nakamura stepped down as president of Namco in 2002, three years prior to the company's merger with Bandai. As the company underwent changes, Monolith Soft felt that they were being given less creative freedom due to the newly-created Bandai Namco being less willing to take creative risks. They received consultation from Nintendo executive director Shinji Hatano, who advised them to continue making innovative projects. This inspired Monolith Soft to break away from Bandai Namco in favor of becoming a Nintendo subsidiary: Monolith Soft was allowed creative freedom in exchange for developing software exclusively for Nintendo platforms.

Initially, Nintendo had acquired an 80% share of the company, while Bandai Namco retained 16% of the company and remained as a development partner in part to strengthen their relationship with Nintendo. The remaining 4% was divided between the company's founders: Tetsuya Takahashi, Hirohide Sugiura, and Yasuyuki Honne. However, by April 2011, Nintendo had acquired the remaining 400 shares from Bandai Namco, granting them 96% ownership of Monolith Soft. The acquisition as a whole was notable for contrasting Nintendo's previous approach of not taking part in mergers and acquisitions of other companies. In a statement on the matter, former Nintendo president Satoru Iwata stated:


In December 2024, Nintendo purchased the remaining shares from the company's founders, fully acquiring Monolith Soft.