If you played BioWare’s wonderful Mass Effect trilogy, you’ll be familiar with its morality system.
Ostensibly reflecting “good” and “bad” playthroughs, the Paragon and Renegade system let players choose different lines of dialogue and key actions that each would each contribute in some way to their character’s Paragon or Renegade score. Paragon points would be obtained for compassionate and heroic actions, while Renegade points were obtained for being ruthless or, well, a bit of a dick.
Paragon and Renegade each had their own scores, which meant being nice every now and then wouldn’t adversely affect a player’s dodgy rep, and vice versa. However, a certain number of points in either track would open dialogue options with significant impact (in the first Mass Effect, high scores would unlock high ranks in the Charm and Intimidate skills).