This great
site using sortinfo gives these 34 games using Dual 8-ways.
Angel Kids (Japan) (angelkds)
Apocaljpse Now (aponow)
Bandido (bandido)
Black Widow (bwidow)
Cloak & Dagger (French) (cloakfr)
Complex X (complexx)
Crazy Climber (Japan) (cclimbrj)
Crazy Climber 2 (Japan) (cclimbr2)
Dribbling (dribling)
Front Line (frontlin)
Indoor Soccer (idsoccer)
Inferno (inferno)
Joyful Road (Japan) (joyfulr)
Krull (krull)
Libble Rabble (liblrabl)
Lost Tomb (easy) (losttomb)
Mars (mars)
Minefield (minefld)
Rescue Raider (rescraid)
Robotron (Solid Blue label) (robotron)
Rock Climber (rockclim)
Screw Loose (prototype) (screwloo)
Smash T.V. (rev 4.00) (smashtv4)
Space Dungeon (sdungeon)
Space Position (Japan) (spcpostn)
Splat! (splat)
Star Guards (stargrds)
Stompin' (stompin)
The Return of Ishtar (roishtar)
The Tin Star (tinstar)
Total Carnage (prototype, rev 1.0 01/25/92) (totcarnp)
Ultra Tank (ultratnk)
Water Match (wmatch)
Wild Western (set 1) (wwestern)
Plus 2 more using Dual 4 ways
Fire Trap (Japan bootleg) (firetpbl)
Karate Champ (US VS version) (kchampvs)