[This game concerns a sadistic kidnapper. Please exercise discretion.]
First Person turns the relationship between the parser and the player on its head, making your interaction with the parser into a dialogue of sorts between a kidnapper and the victim. It's very brief. Details are kept to a minimum, to the point of underimplementation - it sometimes feels more like a proof of concept rather than a full-fledged game that one may be immersed into.
First Person is unsettling once you figure out what's going on, and be warned: there are no happy endings in this one. It's worth playing to figure out what's going on with the parser.