Prime Junta
Guest
Finally - I am asking all the experts in the Codex - is there games that show the sort of C&C wished by the OP? I have played both KOTR and Mass Effect and would not play them again to experience an evil/ or good experience - are those sides drastically different? How much does the plot change?
KOTOR and ME have more pseudo-choices than real-choices. The pyrotechnics are different, the people you kill are different, and the ending slideshow is different, but the main plot arc and resolution is the same. Whatever you do, you'll end up fighting the end boss/fighting your way through that incredibly tedious mob to get hit in the face with a stale fish.
There are games with deeper C&C. From the classics, Fallout 1 and 2 are pretty good examples, especially Fallout 1 IMO (with Fallout 2 the consequences are more in the sub-arcs than the big plot arc). To pick something a little more modern, the Witchers are pretty good with C&C too; things play out materially differently depending on who you side with and what you choose. Dragon Age: Origins has pretty serious C&C as well (although that IMO is its one redeeming feature, I really don't dig the cooldown-based gameplay and dating-game intra-party-shenanigans). NWN2: Mask of the Betrayer will give you a really different experience at all levels when playing as "good" (suppressing the curse) or "evil" (embracing it).
That's a few off the top of my head.