Celebrating Commander Keen's 20th anniversary

After 20 years of Commander Keen, we look back at the history of id Software's classic series

The third episode of the Commander Keen: Invasion of the Vorticons trilogy was Keen Must Die! Its January 1991 release came as Romero, Carmack and the rest of the Keen team split from their software developer employer Softdisk to form id Software.

Image credit: the Commander Keen Wiki at Shikadi.net.

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