Details about these games are minimal right now. First Martians, for example, is based on Trzewiczek's Robinson Crusoe: Adventures on the Cursed Island, but set on the planet Mars, with players facing "the hostile Martian environment and a whole host of new adventures and challenges".
Cry Havoc — from designers Grant Rodiek, Michał Oracz, and Michał Walczak — is "a card-driven, asymmetric war game set in a brutal, science fiction setting". (Cry Havoc was born as Battle for York, and Rodiek has an overview of the design on his Hyperbole Games website.)
51st State: Master Set is likely a collection of all things 51st State, but exactly which things will have to wait until later — possible when Trzewiczek runs through his announcements at Portalcon 7, which he plans to share via Periscope. For now (and always), though, you can experience this teaser video. (More teaser videos below.)