Ada Lovelace: Consulting Mathematician is solo roll-and-write game. it is offered on a pay what you want basis.
1972: The Lost Phantom is a free print and play solitaire game about an F-4 pilot shot down behind enemy lines in Vietnam, trying to find his way back to safety.
1572: The Lost Expedition is a roll and write game designed as a one page, ultraportable game. In it, you are a conquistador trying to reach the Atlantic after a failed expedition.
The COIN Tribes Revolt is a 1 – 4 player about Boudica’s Rebellion against Rome. It’s a nine-card nano game, inspired by GMT’s COIN series.
G63 Gettysburg 1863 is a hex-and-counter board game of the battle of Gettysburg. The print-and-play game is free for the downloading. I am not sure, however, if it is entirely serious in nature. There are just two counters and the board has just seven hexes. The rules, however, seem to indicate something more serious. Strange.