Didn’t see this posted yet.
GOG.com is giving away four games for free:
https://www.gog.com/game/shadow_warrior_
https://www.gog.com/game/stargunner
https://www.gog.com/game/bio_menace
https://www.gog.com/game/tyrian_2000
and some more that may have been free for a long time already….
https://www.gog.com/game/war_for_…d_cr
https://www.gog.com/game/lure_of_the_tem
https://www.gog.com/game/ultima_4
https://www.gog.com/game/teenagent
https://www.gog.com/game/treasure_advent
https://www.gog.com/game/worlds_o…age_
https://www.gog.com/game/ultima_w…ian_
https://www.gog.com/game/eschalon_book_i
https://www.gog.com/game/flight_o…azon
https://www.gog.com/game/sangfroi…were
https://www.gog.com/game/akalabeth_world
https://www.gog.com/game/darkest_…_mus
https://www.gog.com/game/sunrider…f_ar
https://www.gog.com/game/cayne
https://www.gog.com/game/beneath_a_steel