Really enjoying the Half-life 2 mod The Stanley Parable. A great example of what is achievable using FP game engines when creativity breaks free of the predisposition to run and shoot things, this strange fractured narrative with its dominant narrator and meta narrator brings to mind Aldiss' Report on Probability A or the fracturing of narrative form and convention of some of John Fowles's novels (the ending of The Magus for example, when the a narrator suddenly appears to discuss choices and outcomes).
This is clever, intriguing stuff, done with flair but minimal fuss and with starkly simple visuals that point the player back to the experience of the unfolding narrative and the dominant voices of the narrators, confusing, commenting and instigating choice, while all the time undermining and questioning our freedom to really choose. Great stuff!