Alek The Great said:
Yes, Valve has a very different hiring policy because of its unique corporate structure (or lack thereof). They do not have any specific positions and anyone can work on whichever product they wish to. If someone wants to make Half Life 3 they can start the project and people interested in working on it will join in. They only hire senior talent with lots of experience and have no starter positions. I got this from the handbook and from the tour I had at their office (plus chatting with some of the staff on the tour).
The weird thing about the "anyone can start a project and get other people interested" is that
no-one ever has. Or at least there has never been a case where an employer at Valve had an exciting idea for a new IP (since Half-Life 1) and got everyone else excited and made that game.
Check this list of their published games:
Half-Life (1998) - Valve's only original inside IP. Presumably Gabe Newell's idea
Team Fortress (1999) - Fan created mod. Valve hired the guys who developed it and then published it and made improvements
Counter-Strike (2000) - Fan created mod. Valve hired the guys who developed it and then published it and made improvements
Day of Defeat (2003) - Fan created mod. Valve bought the rights, published it and made improvements
Half-Life 2 (2004) -Sequel
Counter-Strike: Source (2004) - Remake
Day of Defeat: Source (2005) - Remake
Half-Life 2: Episode 1 (2006) -Sequel
Half-Life 2: Episode 2 (2007) - Sequel
Team Fortress 2 (2007) - Sequel
Portal (2007) - Game concept developed by a group at Digipen. Valve hired the guys who developed it, made improvements and published.
Left 4 Dead (2008) - Developed by Turtle Rock Studios. Valve hired the guys who developed it, made improvements and published.
Left 4 Dead 2 (2009) - Sequel
Alien Swarm (2010) - Fan made mod. Valve bought the rights and remade it.
Portal 2 (2011) - Sequel
Counter-Strike: Global Offensive (2012) - Sequel
Dota 2 (2013) - Fan made mod. Valve hired the guy who developed it, made improvements and published it (with a 2 in the name)
I don't understand why, when anyone at Valve can start any project they want, no Valve employee (except Gabe Newell) has
ever wanted to make their own game and then gone and done so.
In fact the only time that has happened was with Turtle Rock Studios, who quit Valve and
then made their own IP.