I wrote a short piece of games-focused alternate history for Memory Insufficient's most recent issue (Volume 2, Issue 6, for the sake of time-traveling historians of the future).
It's about Chilean Cybernetics (Cybersyn), avant-garde latin american fiction, and what computer games might be like if they had been born from somewhere besides the American military-industrial complex. More of it is based on fact than you might imagine, though I regret to inform you that Robert Kennedy was not elected in 1968. Download the issue for free. It also includes some games history madlibs written by guest-editor Rachel Simone Weil.