Epistolary RPGs

Epistolary roleplaying games are also called "letter games" or "ghost letters". Play takes the form of letters or similar missives exchanged between characters. The mode of play is textual, though the medium may range from paper letters to electronic journals to audio recordings.

Play is usually freeform; Michal Oracz' De Profundis may be the only published game specifically designed for epistolary play.