Able Spaceman is a set of solo rules for spaceship battles.
space battles
Pz8 Wargames Rules
This 24 page pdf has Pz8’s relatively simple free wargames rules for a variety of periods, including
Colonial
WW1 Divisional
WW2
WW2 Divisional
1939 – 1941 Naval
WW2 Coastal
1935 – 1965 Aerial
1965 – 1075 Aerial
1950 – 1975
1975 – 2010
Science Fiction
Space Combat
Orion’s Gate Space Battles Game
Orion’s Gate is a one-page space battles game.