|Portal: Action/Adventure||Myst series at|
The Myst series of games started in 1993 with the release of point-and-click adventure game Myst, developed by Rand Miller and Cyan Worlds for the personal computer. It featured beautiful pre-rendered 3D graphics, full-motion video cutscenes, and was one of the first games to be released on the then-fledgling CD-ROM format; it would prove instrumental in moving forward the switch from floppy disk to CD. It would go on to become one of the best-selling PC games of all time, spawning four direct sequels (Riven: The Sequel to Myst, Myst III: Exile, Myst IV: Revelation, and Myst V: End of Ages), a remake (realMyst), and a pseudo-MMO spin-off (Uru: Ages Beyond Myst) whose online component was canceled mere months before the planned launch but later resurrected by GameTap, as Myst Online: Uru Live, due to fan pressure.
The last game in the series proper, Myst V: End of Ages, was released in the US on September 19, 2005, 19 days after Cyan Worlds closed the doors of their game-production unit and laid off all related staff. (It should be noted that Cyan did not develop End of Ages, and had not been involved in day-to-day development of the series proper since Riven.)