One bright note is that used copies of both "Gameplayers" and "Warriors" appear to be available via the Marketplace, so at least a few more people have the opportunity to enjoy these classic books. If you can track down Foster's other books, the "Morphodite Trilogy" or "Waves", these two will deliver absorbing reading: "Waves", in particular, is brilliantly atmospheric.
Back to this book: Foster's setting of the sequels hundreds or thousands of years apart is one of the delights, as you can gradually pick up the history that we, as readers, know, but is only available to the characters through myths and partial records. So the villain of the first book has become a saint, in the legends of the characters in the third...
Read it if you can!
The Ler novels ("The Gameplayers of Zan", Warriors, "The Day of the Klesh") are rich in character development and mystery, set in a future galaxy where humans interact with other intelligent species, one of which (the Ler) humans genetically engineered from human stock. The Ler, generally benevolent but different from humans, escape from Earth. Downstream and out in space, some deviant Ler groups create "breeds" of humans, the Klesh.
"The Morphodite", "Transformer", and "Preserver" deal with conflicts between interworld political intrigue and human values, brought about by the creation of a person with special perceptions and abilities - including changing gender and becoming younger by 20 years - the perfect assassin, but also the victim of biological and emotional manipulation.
"Waves" deals with a mystery at a remote experiment station, leading to discoveries about information structure, sentience, and time. "Owl Time" is a collection of novellas that explore unusual dimensions of human meaning, in which Foster celebrates and emulates several older authors.
Hint to publishers: These stories are timeless and precious. They explore issues that we struggle with today. A reprint (maybe in omnibus hardbacks) would certainly ease the pain of old fans and attract new ones too.
Hint to Foster: 17 years is a long time to wait, but I'm patient.