5. Star Wars: Knights of the Old Republic

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BioWare owes much of its current status as one of the industry's biggest developers to the success of the Baldur's Gate series, and of course, Star Wars: Knights of the Old Republic. KotOR not only gave the Star Wars universe an immense, satisfying back story, it also introduced a mechanic that would become one of the RPG genre’s most vital features: player choice.

Darth Malak’s machinations have embroiled the Republic in war. To defeat him, you must embark on a quest – one that entails forming alliances and making many tough decisions. These choices affect your character’s morality, which in turn has serious consequences on the ending.

Aside from the player’s direct influence on how the story ends, KotOR’s twist – which we won't spoil for you – was seen as a radical departure from the typical, safer storylines of its day.

Our rating – 5/5