For those unaware of how Valve runs internally, it works something like this:
Valve hires the most talented and self-motivated people in the business, gives them a desk with wheels, drops them in a room with similarly talented folks, and says "go". There are no bosses, only leaders that rise from consensus, and everybody proposes/aids projects they like. This creative "stew" makes every game a product of passion--Valve employees are invested in everything they create. On the downside, this is why Valve is famously coy about release dates and upcoming projects; everything is up in the air until a game garners enough momentum to merit completion.
Now, think about that for a moment. If you were given amazing game development skills then told to work with your best friends to make whatever you wanted (and had to playtest iterative builds of whatever you made)...what would you make? Would you make a single player game that is essentially "spoiled" from conception? You made it, after all, so the experience of playing the campaign will never be fresh.
I think you'd make a game that could never get stale, something with a strong multi-player component that would let you play with guys in the office. Look at Valve's marquee games since the Orange Box:
- Left 4 Dead
- Left 4 Dead 2
- (so much more Team Fortress 2)
- Portal 2 (with co-op)
- CS: GO
- Dota 2
Only Portal 2 stands out with a strong campaign, and even that featured multi-player heavily. How, then, would Valve graft multiplayer onto something like HL3? They won't, because they are under no obligation to do so.
The short version: Valve employees have enormous freedom, why would they want to make a single-player-only game?
Valve hires the most talented and self-motivated people in the business, gives them a desk with wheels, drops them in a room with similarly talented folks, and says "go". There are no bosses, only leaders that rise from consensus, and everybody proposes/aids projects they like. This creative "stew" makes every game a product of passion--Valve employees are invested in everything they create. On the downside, this is why Valve is famously coy about release dates and upcoming projects; everything is up in the air until a game garners enough momentum to merit completion.
Now, think about that for a moment. If you were given amazing game development skills then told to work with your best friends to make whatever you wanted (and had to playtest iterative builds of whatever you made)...what would you make? Would you make a single player game that is essentially "spoiled" from conception? You made it, after all, so the experience of playing the campaign will never be fresh.
I think you'd make a game that could never get stale, something with a strong multi-player component that would let you play with guys in the office. Look at Valve's marquee games since the Orange Box:
- Left 4 Dead
- Left 4 Dead 2
- (so much more Team Fortress 2)
- Portal 2 (with co-op)
- CS: GO
- Dota 2
Only Portal 2 stands out with a strong campaign, and even that featured multi-player heavily. How, then, would Valve graft multiplayer onto something like HL3? They won't, because they are under no obligation to do so.
The short version: Valve employees have enormous freedom, why would they want to make a single-player-only game?