Clint Hockney is associated with being one of the best in the gaming industry. Gamers point out Splinter Cell: Chaos Theory as being one of his best games, which many fans of the series say is the best game in the entire Splinter Cell series.
Hockney has been with Valve for some time, along with working on the Far Cry 2 game, designing levels for it. However if you check out his profile over at LinkedIn, it does suggest that he thinks its time for a change and he will be moving on.
Hockney has been with Valve ever since 2012 and it has been said that one of the main projects he has worked on has been Left 4 Dead 3.
The question is, will there be another designer who is able to pick up where he leaves off?