diff --git a/src/mame/drivers/commando.cpp b/src/mame/drivers/commando.cpp
index 8d3d40d06bc..f5f23046f53 100644
--- a/src/mame/drivers/commando.cpp
+++ b/src/mame/drivers/commando.cpp
@@ -619,6 +619,44 @@ ROM_START( sinvasnb )
 	ROM_LOAD( "vtb6.6e",  0x0500, 0x0100, CRC(0eaf5158) SHA1(bafd4108708f66cd7b280e47152b108f3e254fc9) )    /* video timing (not used) */
 ROM_END
 
+ROM_START( mercenario )
+	ROM_REGION( 0xc000, "maincpu", 0 )
+	ROM_LOAD( "4ac.bin",  0x0000, 0x4000, CRC(59ebf408) SHA1(ce2c06580a9fc902b1f6409249f25eba8216af8a) )
+	ROM_LOAD( "4bc.bin",  0x4000, 0x4000, CRC(aca99905) SHA1(609cf3d180ceb0c67e2deff9db16fa56c8948a97) )
+	ROM_LOAD( "3c.8m",    0x8000, 0x4000, CRC(f998d08a) SHA1(05d86daeaaffbf5f67c77b630b91064c9ae7b6d4) )
+
+	ROM_REGION( 0x10000, "audiocpu", 0 )
+	ROM_LOAD( "cm02.9f",  0x0000, 0x4000, CRC(f9cc4a74) SHA1(ee8dd73919c6f47f62cc6d999de9510db9f79b8f) )    // 2c.9f
+
+	ROM_REGION( 0x4000, "gfx1", 0 )
+	ROM_LOAD( "1c.5d",    0x0000, 0x4000, CRC(fe3ebe35) SHA1(298f1620e83929af01bc9c999262c022e9421c41) )    // characters
+
+	ROM_REGION( 0x18000, "gfx2", 0 )
+	ROM_LOAD( "vt11.5a",  0x00000, 0x4000, CRC(7b2e1b48) SHA1(5d49e1d8146e4ef744445b68f35677302e875a85) )   // 11c.5a
+	ROM_LOAD( "vt12.6a",  0x04000, 0x4000, CRC(81b417d3) SHA1(5ec7e3f0c8069384a5f6eb39232c228b9d7b8c0c) )   // 12c.6a
+	ROM_LOAD( "vt13.7a",  0x08000, 0x4000, CRC(5612dbd2) SHA1(9e4e1a22b6cbf60607b9a81dae34482ae55f7c47) )   // 13c.7a
+	ROM_LOAD( "vt14.8a",  0x0c000, 0x4000, CRC(2b2dee36) SHA1(8792278464fa3da47176582025f6673a15a581e2) )   // 14c.8a
+	ROM_LOAD( "vt15.9a",  0x10000, 0x4000, CRC(de70babf) SHA1(6717e23baf55f84d3143fb432140a7c3e102ac26) )   // 15c.9a
+	ROM_LOAD( "vt16.10a", 0x14000, 0x4000, CRC(14178237) SHA1(f896e71c7004349c9a46155edfd9f0aaa186065d) )   // 16c.10a
+
+	ROM_REGION( 0x18000, "gfx3", 0 )
+	ROM_LOAD( "vt05.7e",  0x00000, 0x4000, CRC(79f16e3d) SHA1(04e1f03a4d6b4cc2b81bce3a290bbb95de900d35) )   // 5c.7e
+	ROM_LOAD( "vt06.8e",  0x04000, 0x4000, CRC(26fee521) SHA1(2fbfc73ee860f72a20229a01d4da9f5cc2e858d3) )   // 6c.8e
+	ROM_LOAD( "vt07.9e",  0x08000, 0x4000, CRC(ca88bdfd) SHA1(548b05460bc7983cc81f15c70e87f47d10db2812) )   // 7c.9e
+	ROM_LOAD( "vt08.7h",  0x0c000, 0x4000, CRC(2019c883) SHA1(883c0156ceab99f4849fe36972c4162b4ac8c216) )   // 8c.7h
+	ROM_LOAD( "vt09.8h",  0x10000, 0x4000, CRC(98703982) SHA1(ba9a9b0dcadd4f52502828408c4a19b0bd518351) )   // 9c.8h
+	ROM_LOAD( "vt10.9h",  0x14000, 0x4000, CRC(f069d2f8) SHA1(2c92300a9407470b34965021de882f1f7a84730c) )   // 10c.9h
+
+	ROM_REGION( 0x600, "proms", 0 )
+	ROM_LOAD( "vtb1.1d",  0x0000, 0x0100, CRC(3aba15a1) SHA1(8b057f6e26155dd9e48bde182e680fce4519f600) )    /* red */
+	ROM_LOAD( "vtb2.2d",  0x0100, 0x0100, CRC(88865754) SHA1(ca6dddca98baf00a65b2fb70b69cf4704ef8c831) )    /* green */
+	ROM_LOAD( "vtb3.3d",  0x0200, 0x0100, CRC(4c14c3f6) SHA1(644ac17c7413f094ec9a15cba87bbd421b26321f) )    /* blue */
+	ROM_LOAD( "vtb4.1h",  0x0300, 0x0100, CRC(b388c246) SHA1(038f9851699331ad887b6281a9df053dca3db8fd) )    /* palette selector (not used) */
+	ROM_LOAD( "vtb5.6l",  0x0400, 0x0100, CRC(712ac508) SHA1(5349d722ab6733afdda65f6e0a98322f0d515e86) )    /* interrupt timing (not used) */
+	ROM_LOAD( "vtb6.6e",  0x0500, 0x0100, CRC(0eaf5158) SHA1(bafd4108708f66cd7b280e47152b108f3e254fc9) )    /* video timing (not used) */
+ROM_END
+
+
 /* Driver Initialization */
 
 DRIVER_INIT_MEMBER(commando_state,commando)
@@ -649,10 +687,11 @@ DRIVER_INIT_MEMBER(commando_state,spaceinv)
 /* Game Drivers */
 
 GAME( 1985, commando,  0,        commando, commando, commando_state, commando, ROT270, "Capcom", "Commando (World)", MACHINE_SUPPORTS_SAVE )
-GAME( 1985, commandou, commando, commando, commandou, commando_state,commando, ROT270, "Capcom (Data East USA license)", "Commando (US set 1)", MACHINE_SUPPORTS_SAVE )
-GAME( 1985, commandou2, commando, commando, commando, commando_state, commando, ROT270, "Capcom (Data East USA license)", "Commando (US set 2)", MACHINE_SUPPORTS_SAVE )
+GAME( 1985, commandou, commando, commando, commandou,commando_state, commando, ROT270, "Capcom (Data East USA license)", "Commando (US set 1)", MACHINE_SUPPORTS_SAVE )
+GAME( 1985, commandou2,commando, commando, commando, commando_state, commando, ROT270, "Capcom (Data East USA license)", "Commando (US set 2)", MACHINE_SUPPORTS_SAVE )
 GAME( 1985, commandoj, commando, commando, commando, commando_state, commando, ROT270, "Capcom", "Senjou no Ookami", MACHINE_SUPPORTS_SAVE )
 GAME( 1985, commandob, commando, commando, commando, commando_state, spaceinv, ROT270, "bootleg", "Commando (bootleg set 1)", MACHINE_SUPPORTS_SAVE )
 GAME( 1985, commandob2,commando, commando, commando, commando_state, commando, ROT270, "bootleg", "Commando (bootleg set 2)", MACHINE_SUPPORTS_SAVE )
 GAME( 1985, sinvasn,   commando, commando, commando, commando_state, commando, ROT270, "Capcom", "Space Invasion (Europe)", MACHINE_SUPPORTS_SAVE )
 GAME( 1985, sinvasnb,  commando, commando, commando, commando_state, spaceinv, ROT270, "bootleg", "Space Invasion (bootleg)", MACHINE_SUPPORTS_SAVE )
+GAME( 1985, mercenario,commando, commando, commando, commando_state, spaceinv, ROT270, "bootleg", "Mercenario (Commando bootleg)", MACHINE_SUPPORTS_SAVE )
diff --git a/src/mame/mame.lst b/src/mame/mame.lst
index 1718c633370..78e5138d37b 100644
--- a/src/mame/mame.lst
+++ b/src/mame/mame.lst
@@ -9595,6 +9595,7 @@ commandou                       // 5/1985 (c) 1985 + Data East license (US)
 commandou2                      // 5/1985 (c) 1985 + Data East license (US)
 sinvasn                         // Europe original?
 sinvasnb                        // bootleg
+mercenario			// bootleg
 
 @source:compgolf.cpp
 compgolf                        // (c) 1985 Data East Corporation (Japan)