Before the much publicized closure of 38 Studios/Big Huge Games I had the fortune of sharing an office with the inimitable Ken Rolston. You might know Mr. Rolston from the Elder Scrolls titles Morrowind and Oblivion, or from his contributions to the tabletop RPG Paranoia and the board game Tales of the Arabian Nights. Some only recently learned of Mr. Rolston from Kingdoms of Amalur: Reckoning; others know of him from his old-school, pen-and-paper contributions. Whether or not you're familiar with his games, you've most likely played something influenced by him.
And what are the hallmarks of his legacy? The type of fun he wants to elicit in a video game can just as easily be found in Paranoia or Tales of the Arabian Nights. His creativity seems to spark from that same kernel of imagination that is so integral to what makes table-top RPGs viable. It's a smile or a sense of accomplishment, but more importantly it's your smile or your sense of accomplishment. It's emergent narrative in the truest sense, and he instills it in everything he touches.
And how does he bring about his particular brand of emergent narrative, you might ask? I will hereby endeavor to translate as best I can the incoherent ramblings of genius.
Disclaimer: The following design principles are not meant to be representative of Mr. Rolston's design philosophy in toto. They are simply three digestible points made by Ken frequently enough to leave a lasting impression. These three principles are Ken's Four Pillars of Open World RPGs, the Rolston Switch, and the Importance of Competitive Research.