Stainless Veteran
Arcane
For me it was Lionheart. Setting had so much potential if used properly - and it all dissolved into mindless and meaningless clicka-clacka. It had tarnished both Black Isle and Interplay names to boot. Heh, I looked up what other shit the developers have churned out in the meantime, and the list is quote telling.
Lionheart: Legacy of the Crusader 2003 Windows Published by Interplay Entertainment
Ricochet Lost Worlds 2004 Macintosh, Windows
Wik and the Fable of Souls 2004 Windows, Xbox 360 (XBLA)
Ricochet Lost Worlds: Recharged 2004 Windows
Big Kahuna Reef 2004 Macintosh, Windows
Big Kahuna Words 2005 Windows
Mosaic: Tomb of Mystery 2006 Windows
Big Kahuna Reef 2 2006 Macintosh, Windows
Monarch: The Butterfly King 2007 Windows
Ricochet Infinity 2007 Macintosh, Windows
The Great Tree 2007 Windows
Airport Mania 2008 iPhone, Macintosh, Windows
Build In Time 2008 Macintosh, Windows
Big Kahuna Party 2008 Wii (WiiWare)
Miss Teri Tale: Where's Jason 2008 Macintosh, Windows Developed by Ouat Entertainment
Music Catch 2008 iPhone, Macintosh, Windows
Swarm Gold 2008 Macintosh, Windows
Costume Chaos 2009 Macintosh, Windows
A Fairy Tale 2009 Macintosh, Windows
Sprouts Adventure 2009 Macintosh, Windows
Simplz: Zoo 2010 Macintosh, Windows
Demolition League 2010 Web Game (Facebook)