Journey is a Sony IP. It is copyritten on Sony's website. As fun as it is to try to win the fanboy wars, this isn't the way to go about it. Try doing some research first.
"PlayStation" and the "PS" Family logo are registered trademarks of Sony Computer Entertainment Inc.
PS3 is a trademark of Sony Computer Entertainment Inc.
© 2012 Sony Computer Entertainment America LLC. Journey is a trademark of Sony Computer Entertainment America LLC. Developed by thatgamecompany.
http://us.playstation.com/games-and-media/games/journey-ps3.html
I'm going to search through some other games on Sony's site since I'm bored tonight.
Beyond does not have a Sony trademark
Unfinished Swan is owned by Sony. I don't know if this was on any list, but I checked it anyway.
Papa and Yo is not owned by Sony (that surprised me)
Heavy Rain not Sony
Linger in Shadows not Sony
Mister Mosquito not owned by Sony
PaRappa the Rappr IS owned by Sony
PixelJunk not owned by Sony
PoPoLoCrois not Sony
Grind session page does not have the Sony trademark
Heavenly Sword IS owned by Sony
Jeanne d'Arc does not appear to be owned by Sony, the copyright holder is not named
Lair is owned by Sony
My Street not owned by Sony, copyright holder not named
Okage not trademarked, copyright holder not named
I don't know how reliable the website is. Often times the trademark holder is not named. I don't know if Sony's just being lazy or if it's because they genuinely don't own it. Either way, I'm stopping here. I recommend further research be done if you want a reliable list.