There was one closer than that, but still it was not a lone designer being hired into a computer game company. I am not saying this out of malice, as it is always taken on this site, but the computer game industry does not hire game designers. They generally "promote" a programmer or artist who has had good ideas over the years to "game designer". But it's not their field, is it? Giving someone the title does not make them a game designer, it just puts them into that position. They spent their lives learning programming, or art, not designing games.
In the earliest days of computer games New World Computing made "King's Bounty". You know "King's Bounty II" as "Heroes of Might & Magic". King's Bounty was a board game by Task Force Games, this happened while I was working there. I met the designer of King's Bounty back then. But NWC never hired him as a designer, we made the board game and NWC simultaneously made the computer game version. This was the first ever combined effort to simultaneously release a board game and computer game.
But the situation was very unique. NWC had been founded by SFB Staff and Rated Aces. Ron Spitzer is a legend among the SFB Staff, Jon Van Cannaghem was the 1986 National Champion, and all of the other NWC founders were either SFB Staff or Rated Aces from the tournament system. NWC had bought TFG, and owned TFG at the time the King's Bounty project had started. The designer of King's Bounty was a friend of theirs, and of John Olsen who NWC sold TFG too once they discovered that Paramount would not authorize an SFB computer game (the whole reason they had bought TFG.
That is the closest situation I know of anything like that ever happening. I really think it is wrong to create the impression that you can design a game and anyone is going to hire you into the industry to make it. It has never happened yet, and isn't ever likely too. The computer game industry does not hire game designers, they designate programmers and artists as game designers. The only way for a game designer to get into the industry is to found their own company from scratch.