▁Under se a ▁Environment ▁( 1 9 8 3 ), ▁and ▁The ▁Des ert ▁Environment ▁( 1 9 8 4 ). ▁ ▁J . ▁Andrew ▁Keith ▁wrote ▁some ▁advent ures ▁for ▁Fant asy ▁Games ▁Un limited ' s ▁Ch ival ry ▁& ▁Sor c ery ▁before ▁the ▁line ▁ended . ▁The ▁Keith ▁brothers ▁expanded ▁into ▁F G U ' s ▁other ▁lines ▁in ▁ 1 9 8 5 ▁including ▁After math !, ▁D are dev ils , ▁Flash ing ▁Bl ades , ▁and ▁P si ▁World . ▁The ▁Keith ▁brothers ▁also ▁designed ▁Fre edom ▁F igh ters ▁( 1 9 8 6 ), ▁one ▁of ▁the ▁last ▁role - play ing ▁games ▁published ▁by ▁F G U . ▁ ▁Works ▁▁ ▁Andrew ▁was ▁a ▁rather ▁pro l ific ▁Science ▁F iction ▁and ▁Ro le - Play ing ▁Game ▁author , ▁and ▁the ▁bibli ography ▁presented ▁below ▁is ▁in ▁no ▁way ▁compreh ensive . ▁Several ▁of ▁these ▁works ▁were ▁with ▁various ▁co - auth ors , ▁most ▁commonly ▁his ▁brother , ▁William ▁H . ▁Keith ▁Jr . ▁▁ ▁A ▁note ▁regarding ▁pen ▁names ▁in ▁the ▁words ▁of ▁William ▁H . ▁Keith ▁Jr .: ▁" We ▁shared ▁several ▁[ pen ▁names ]: ▁Keith ▁William ▁Andrew s , ▁Keith ▁Doug lass , ▁and ▁H . ▁Jay ▁R iker . ▁Back ▁in ▁the ▁Tra v eller ▁days , ▁when ▁he ▁was ▁doing ▁a ▁ton ▁of ▁writing ▁for ▁the ▁old ▁Journal ▁of ▁the ▁Tra v eller ' s ▁A id ▁Society , ▁he ▁used ▁several ▁pen ▁names ,