id Software was founded by John Carmack, John Romero, Tom Hall, and Adrian Carmack.
id Software started its first design and development efforts in October 1990.
id Software launched commercially in December 1990.
id Software was incorporated in June 1991.
id Software was acquired by ZeniMax Media in June 2009.
id Software was headquartered in Dallas, USA.
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DEC 1990 Super Mario Brothers 3 Demo
JUN 1991 Articles of Incorporation
APR 2016 The Early Days of id Software