Ion Storm, L.P. was an American video game developer founded by John Romero and Tom Hall, both formerly of id Software. Despite an impressive pedigree and high expectations, the company only produced one commercial and critical success, 2000's Deus Ex.

Alfonso John Romero is an American director, designer, programmer and developer in the video game industry. He is a co-founder of id Software and designed their early games, including Wolfenstein 3D (1992), Doom (1993), Doom II (1994), Hexen (1995) and Quake (1996). His designs and development tools, along with programming techniques developed by id Software's lead programmer, John Carmack, popularized the first-person shooter (FPS) genre. Romero is also credited with coining the multiplayer term "deathmatch".