Doomsday Warrior, known in Japan as Taiketsu!! Brass Numbers (対決！！ブラスナンバーズ, lit. "Confrontation!! Brass Numbers"), is a 1992 Super NES fighting game developed and published by Telenet Japan's subsidiary Laser Soft in Japan on November 20, 1992 and later localized by Renovation Products in North America in March 1993. It was created during the fighting game trend of the 1990s that was popularized by Capcom's Street Fighter II.

Doomsday Warrior was added to the Nintendo Switch Online subscription service in February 2021.

The player takes the role of a member of the Doom Squad, a group of fighters who are under the influence of Main, a diabolical sorcerer (vengeful angel in Japan). The character the player chooses betrays the Doom Squad and battles for the people of Earth. To win, one's character must fight its former comrades of the Doom Squad. The player can choose which opponent to face after every battle. Ability Points are earned for winning each battle and are added to the character's current stats (Arm Power, Leg Power, Defense, Vitality, Soul Power).