I can't see any on the US or UK stores... In fact Valve is not listed as a publisher when I had a quick search.
I didn't think they ever were on Origin and I can't find any google evidence of them being on Origin but if you have a link to show it was on Origin (not just selling a Steam key) I genuinely would be interested to read up on it.
I was pretty sure they didn't do things like support other companies online systems for example Valve don't put games onto the Mac App Store. They support many platforms but if at all possible they control the store and the users. They even managed to get Sony to agree to a bit of Steam on PS3!
Sorry, I stand corrected. you can't buy them on Origin but in stores since they where the publisher;
http://www.ea.com/search?q=Valve
I had the previous Battlefields and Mass Effects on Steam and I thought it was a crappy move on that part. It just never resonated with me to be honest.
At the end of the day, Origin is not terrible. It's mediocre, but not half-bad, and it aint really much more buggy than Steam on OSX.
And frankly EA gets to much flack. Two years in a row they have been awarded the worst company in America. Obviously that is a fallacy. There is no way a videogame company (even EA) is worse than the likes of Halibuton or Monsanto. It's just sad really.
What I have a problem with is, Uplay. I have Steam bought Ubisoft games that has Uplay underneath it. Uplay really works poorly.
The point I wanted to make was that Valve could take a stance where they said; okay. From now on, all future Valve games (including DOTA 2) will only work on our OS, lol. And steam os can run all games besides EA games.
I think it's pretty sassy that Valve through all these years have been very anti-monopoly. We have so many great games On Demand, we have Gog.com which is amazing. We have green man gaming which is also awesome. We have Amazon.
Steam really created this industry but never tried to kill competition from the other stores. Of course there is no doubt it hurts when EA, the largest publisher in the world doesn't want to have anything more to do with you.
None of us can really say how big a risk Steambox and Steam OS is for the company. And unlike Microsoft and Sony, you are dealing with a company with a lot less experience and other groups to support it. Plus Valve is a boss free structured group, which is why many things move slow. It's really trippy.
I personally think it's a risk. Obviously Steam is a big win for them. 30% of every purchase right in their pocket is good business. But I don't think their income is any close to Sony, Microsoft or Google who are some of the most important companies in the world.
And all of these companies have had to varying degree a history of trying to destroy competition.