diff --git a/src/mame/drivers/namcos10.c b/src/mame/drivers/namcos10.c
index 69f1ce6142c..56d14da3543 100644
--- a/src/mame/drivers/namcos10.c
+++ b/src/mame/drivers/namcos10.c
@@ -748,7 +748,16 @@ ROM_START( ptblank3 )
 	ROM_FILL( 0x0000000, 0x400000, 0x55 )
 
 	ROM_REGION16_LE( 0x2100000, "user2", 0 ) /* main prg */
-	ROM_LOAD( "gnn2a.8e",         0x0000000, 0x1080000, CRC(31b39221) SHA1(7fcb14aaa26c531928a6cd704e746d0e3ae3e031) )
+	ROM_LOAD( "gnn2a.8e",         0x0000000, 0x1080000, CRC(f5bb531f) SHA1(0b2ab23aab41179d9210584261713e0bcf6ff2af) )
+	ROM_LOAD( "gnn2a.8d",         0x1080000, 0x1080000, CRC(82d2cfb5) SHA1(4b5e713a55e74a7b32b1b9b5811892df2df86256) )
+ROM_END
+
+ROM_START( ptblank3a )
+	ROM_REGION32_LE( 0x400000, "maincpu:rom", 0 ) /* bios */
+	ROM_FILL( 0x0000000, 0x400000, 0x55 )
+
+	ROM_REGION16_LE( 0x2100000, "user2", 0 ) /* main prg */
+	ROM_LOAD( "gnn2a-alt.8e",     0x0000000, 0x1080000, CRC(31b39221) SHA1(7fcb14aaa26c531928a6cd704e746d0e3ae3e031) )
 	ROM_LOAD( "gnn2a.8d",         0x1080000, 0x1080000, CRC(82d2cfb5) SHA1(4b5e713a55e74a7b32b1b9b5811892df2df86256) )
 ROM_END
 
@@ -807,6 +816,7 @@ ROM_END
 GAME( 2000, mrdrilr2,  0,        namcos10_memm, namcos10, namcos10_state, mrdrilr2, ROT0, "Namco", "Mr. Driller 2 (Japan, DR21 Ver.A)", GAME_NOT_WORKING | GAME_NO_SOUND ) // PORT_4WAY joysticks
 GAME( 2000, mrdrlr2a,  mrdrilr2, namcos10_memm, namcos10, namcos10_state, mrdrilr2, ROT0, "Namco", "Mr. Driller 2 (Japan, DR22 Ver.A)", GAME_NOT_WORKING | GAME_NO_SOUND ) // PORT_4WAY joysticks
 GAME( 2000, ptblank3,  0,        namcos10_memn, namcos10, namcos10_state, gunbalna, ROT0, "Namco", "Point Blank 3 (GNN2 Ver.A)", GAME_NOT_WORKING | GAME_NO_SOUND )
+GAME( 2000, ptblank3a, ptblank3, namcos10_memn, namcos10, namcos10_state, gunbalna, ROT0, "Namco", "Point Blank 3 (GNN2 Ver.A alt)", GAME_NOT_WORKING | GAME_NO_SOUND )
 GAME( 2000, gunbalina, ptblank3, namcos10_memn, namcos10, namcos10_state, gunbalna, ROT0, "Namco", "Gunbalina (GNN1 Ver.A)", GAME_NOT_WORKING | GAME_NO_SOUND )
 GAME( 2001, gjspace,   0,        namcos10_memn, namcos10, namcos10_state, gjspace,  ROT0, "Namco / Metro", "Gekitoride-Jong Space (10011 Ver.A)", GAME_NOT_WORKING | GAME_NO_SOUND )
 GAME( 2001, mrdrilrg,  0,        namcos10_memn, namcos10, namcos10_state, mrdrilrg, ROT0, "Namco", "Mr. Driller G (Japan, DRG1 Ver.A)", GAME_NOT_WORKING | GAME_NO_SOUND ) // PORT_4WAY joysticks
diff --git a/src/mame/mame.lst b/src/mame/mame.lst
index 5fb89a4b89a..3cbc8a4c213 100644
--- a/src/mame/mame.lst
+++ b/src/mame/mame.lst
@@ -3720,6 +3720,7 @@ sws2001         // 2001.04 Super World Stadium 2001 (SS11/VER.A, Japan)
 mrdrilr2        // 2000.07 Mr Driller 2 (DR21 Ver.A)
 mrdrlr2a        // 2000.?? Mr Driller 2 (DR22 Ver.A)
 ptblank3        // 2000.12 Point Blank 3 (GNN2 Ver.A)
+ptblank3a       // 2000.12 Point Blank 3 (GNN2 Ver.A alt)
 gunbalina       // 2000.12 Gunbalina (GNN1 Ver.A)
 				// 2001.02 Photo Battole
 				// 2001.02 Taiko no Tatsujin