Sometimes owners sell all other stocks except the control package. It doesn't need to be 51% to have a say in what goes
Anyway, corporate interests and bigger market share will probably destroy my hobby in the near future. I'm dissapointed with almost every developer I used to love in the past. In short:
Blizzard - long development cycle, drm restrictions, little outdated feeling from their latest games /SCII, Diablo III/
Valve - lost me as a customer with postponing or even canceling HL2:EP3, which was the franchise that put them at the top. Decisions of making casual multiplayer shooters and puzzle games.
Relic - questionable design decisions in their recent games. If they listen to the public, they should make asap COH2. Current players of COH equal the number of players of their last 2 Warhammer games. They are a hit and miss, listening to fan feedback.
Bioware - do I even need to go there?
Obsidian - currently struggling after a few failed projects.
Monolith - maybe some internal problems, maybe pressure from the publishers, but this studio went down fast and aren't even close to what they once were.
Piranha Bytes - making the same mistakes over and over. That's the feeling I get after trying out Risen 2 Beta.
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There are still great game developers. I was recently surprised by Remedy and Frictional Games and the way they interact with the community. Also so far I'm pleased with Rockstar's products, hoping Max Payne 3 will be as good as the previous games.