diff --git a/src/mame/snk/hng64.cpp b/src/mame/snk/hng64.cpp
index ec7cecd30c8a5..f2a1e712aa151 100644
--- a/src/mame/snk/hng64.cpp
+++ b/src/mame/snk/hng64.cpp
@@ -3211,13 +3211,13 @@ ROM_START( buriki )
 ROM_END
 
 /* BIOS */
-GAME( 1997, hng64,    0,     hng64_default, hng64,          hng64_state, init_hng64,       ROT0, "SNK",       "Hyper NeoGeo 64 BIOS", MACHINE_NOT_WORKING|MACHINE_IMPERFECT_SOUND|MACHINE_IS_BIOS_ROOT )
+GAME( 1997, hng64,    0,     hng64_default, hng64,          hng64_state, init_hng64,       ROT0, "SNK",       "Hyper NeoGeo 64 BIOS", MACHINE_IMPERFECT_GRAPHICS | MACHINE_IMPERFECT_SOUND | MACHINE_IS_BIOS_ROOT )
 
 /* Games */
-GAME( 1997, roadedge, hng64, hng64_drive,   hng64_drive,    hng64_state, init_roadedge,    ROT0, "SNK",       "Roads Edge / Round Trip RV (rev.B)", MACHINE_NOT_WORKING|MACHINE_IMPERFECT_SOUND )  /* 001 */
-GAME( 1998, sams64,   hng64, hng64_fight,   hng64_fight,    hng64_state, init_ss64,        ROT0, "SNK",       "Samurai Shodown 64 / Samurai Spirits / Paewang Jeonseol 64", MACHINE_NOT_WORKING|MACHINE_IMPERFECT_SOUND ) /* 002 */
-GAME( 1998, xrally,   hng64, hng64_drive,   hng64_drive,    hng64_state, init_hng64_drive, ROT0, "SNK",       "Xtreme Rally / Off Beat Racer!", MACHINE_NOT_WORKING|MACHINE_IMPERFECT_SOUND )  /* 003 */
-GAME( 1998, bbust2,   hng64, hng64_shoot,   hng64_shoot,    hng64_state, init_hng64_shoot, ROT0, "SNK / ADK", "Beast Busters: Second Nightmare", MACHINE_NOT_WORKING|MACHINE_IMPERFECT_SOUND )  /* 004 */ // ADK credited in the ending sequence
-GAME( 1998, sams64_2, hng64, hng64_fight,   hng64_fight,    hng64_state, init_ss64,        ROT0, "SNK",       "Samurai Shodown 64: Warriors Rage / Samurai Spirits 2: Asura Zanmaden", MACHINE_NOT_WORKING|MACHINE_IMPERFECT_SOUND ) /* 005 */
-GAME( 1998, fatfurwa, hng64, hng64_fight,   hng64_fight,    hng64_state, init_hng64_fght,  ROT0, "SNK",       "Fatal Fury: Wild Ambition / Garou Densetsu: Wild Ambition (rev.A)", MACHINE_NOT_WORKING|MACHINE_IMPERFECT_SOUND )  /* 006 */
-GAME( 1999, buriki,   hng64, hng64_fight,   hng64_fight,    hng64_state, init_hng64_fght,  ROT0, "SNK",       "Buriki One: World Grapple Tournament '99 in Tokyo (rev.B)", MACHINE_NOT_WORKING|MACHINE_IMPERFECT_SOUND )  /* 007 */
+GAME( 1997, roadedge, hng64, hng64_drive,   hng64_drive,    hng64_state, init_roadedge,    ROT0, "SNK",       "Roads Edge / Round Trip RV (rev.B)", MACHINE_IMPERFECT_GRAPHICS | MACHINE_IMPERFECT_SOUND | MACHINE_NODEVICE_LAN )  /* 001 */
+GAME( 1998, sams64,   hng64, hng64_fight,   hng64_fight,    hng64_state, init_ss64,        ROT0, "SNK",       "Samurai Shodown 64 / Samurai Spirits / Paewang Jeonseol 64", MACHINE_IMPERFECT_GRAPHICS | MACHINE_IMPERFECT_SOUND ) /* 002 */
+GAME( 1998, xrally,   hng64, hng64_drive,   hng64_drive,    hng64_state, init_hng64_drive, ROT0, "SNK",       "Xtreme Rally / Off Beat Racer!", MACHINE_IMPERFECT_GRAPHICS | MACHINE_IMPERFECT_SOUND | MACHINE_NODEVICE_LAN )  /* 003 */
+GAME( 1998, bbust2,   hng64, hng64_shoot,   hng64_shoot,    hng64_state, init_hng64_shoot, ROT0, "SNK / ADK", "Beast Busters: Second Nightmare", MACHINE_IMPERFECT_GRAPHICS | MACHINE_IMPERFECT_SOUND )  /* 004 */ // ADK credited in the ending sequence
+GAME( 1998, sams64_2, hng64, hng64_fight,   hng64_fight,    hng64_state, init_ss64,        ROT0, "SNK",       "Samurai Shodown 64: Warriors Rage / Samurai Spirits 2: Asura Zanmaden", MACHINE_IMPERFECT_GRAPHICS | MACHINE_IMPERFECT_SOUND ) /* 005 */
+GAME( 1998, fatfurwa, hng64, hng64_fight,   hng64_fight,    hng64_state, init_hng64_fght,  ROT0, "SNK",       "Fatal Fury: Wild Ambition / Garou Densetsu: Wild Ambition (rev.A)", MACHINE_IMPERFECT_GRAPHICS | MACHINE_IMPERFECT_SOUND )  /* 006 */
+GAME( 1999, buriki,   hng64, hng64_fight,   hng64_fight,    hng64_state, init_hng64_fght,  ROT0, "SNK",       "Buriki One: World Grapple Tournament '99 in Tokyo (rev.B)", MACHINE_IMPERFECT_GRAPHICS | MACHINE_IMPERFECT_SOUND )  /* 007 */