For what systems, exactly? Here's a quick rundown...
PC: Baldur's Gate 1, 2, and expansions; Planescape: Torment; Icewind Dale 1 & 2; Diablo II; Might & Magic 6 & 7; Deus Ex; Fallout 1 & 2; Wizardry 8; Nox (I may be alone in remembering this game)
PC/XBOX: KotOR 1 & 2; Jade Empire; TES: Morrowind; Arx Fatalis; The Bard's Tale; Fable (Didn't care for it myself, but listing for completion's sake)
360: Mass Effect
360/PC/PS3: TES: Oblivion
PS2/PC: Summoner 1 & 2
"'Casual games' are something the 'Game Industry' invented to explain away the Wii success instead of actually listening or looking at what Nintendo did. There is no 'casual strategy' from Nintendo. 'Accessible strategy', yes, but ‘casual gamers’ is just the 'Game Industry''s polite way of saying what they feel: 'retarded gamers'."
-Sean Malstrom