Planet Psychon has a lot going on here. It clocks in at two hundred forty four pages of old school weirdness & space madness setting material. All of this takes place within the nine planets of the solar system warped in the candy coating of Seventies Science Fantasy goodness.
This thing is a jam packed closet of material on all of the nine planets. Planet Psychon has every thing but the kitchen sink thrown into its bowels. It has everything from mutations, encounter tables, background tables, full on mini encounters, etc. Its a glorious OSR mess of a book. I mean this in the best way possible. There's little editing, a shot gun blast of OSR goodness, & a lot of editing is needed but its free & totally usable.
What system could it be used for? What OSR system couldn't it be used with Planet Psychon
Let's see Gamma World any edition, Lamentations of the Flame Princess, Mutant Future, the TSR Buck Rogers game, Astonishing Swordsmen & Sorcerers of Hyperborea, & yes especially Venger Satanis's Cha'alt.
Between Chris Tamm's Planet Psychon , Space Book, Stone Age Sorcery, & the GAMMA AEON compilation you've got a very weird OSR or Mutant Future post space apocalypse campaign to keep your gaming group going for years!
If Chris Tamm's OSR material is used with let's say B1 In Search of The Unknown by Mike Carr then the dungeon master could have his players on their toes for years. Add in B1 In Search of the Unknown free source book & you'll keep your gaming going for years with a Science Fantasy blend.
The sourcebook is a free jammed packed piece of OSR goodness with all kinds of old school awesomeness. Its available for download in the fifth paragraph down with the words "Demos Sachlas (paleologos of Dragonsfoot) has assembled a mighty B1 Campaign Sourcebook (link is for pdf download; linked here with permission), which is subtitled "a collection of original work and material gathered from the pages of Dragonsfoot and elsewhere on the internet". Since I don't have permission to host the link, go to the Zenopus Archives & you won't be sorry.