MercurySteam
| MercurySteam | |
| Company type | Sociedad Limitada | 
| Industry | Video games | 
| Predecessor | Rebel Act Studios | 
| Founded | May 2002 | 
| Founders | Enric Alvarez José Ignacio Navas | 
| Headquarters | San Sebastián de los Reyes, Madrid, Spain | 
| Key people | Enric Álvarez Dave Cox | 
| Owner | Nordisk Film (40%) | 
| Number of employees | 246 (Nov. 2024) | 
| Website | mercurysteam | 
Mercury Steam Entertainment S.L., doing business as MercurySteam, is a Spanish video game developer based in San Sebastián de los Reyes, Madrid. It was founded by former members of Rebel Act Studios, who had developed Severance: Blade of Darkness in 2001. Dave Cox, a producer at Konami, assisted MercurySteam during the Castlevania: Lords of Shadow trilogy.
After MercurySteam pitched a remake of the 2002 game Metroid Fusion to Nintendo, the producer, Yoshio Sakamoto, hired them to create a remake of Metroid II instead. MercurySteam collaborated with Nintendo again to develop a new game, Metroid Dread, for the Nintendo Switch. In December 2020, Nordisk Film, under their Nordisk Games division, purchased a 40% stake in the studio.