Unseen Objects

As a build-up to Metal Slug 3's development, there's a shocking amount of elements introduced in that game lurking inside Metal Slug X's code!
A big cheers to Mr_Beacon00 (信标先生) for working out a way to see these, and making all the discoveries on this page! His code replaces one of the prisoners in Mission 1 with whatever object ID is assigned. To see these for yourself, it requires the usage of Cheat Engine 6.83 and this .CT address table. It's optimised for use with WinKawaks 1.65.

To use:

If there are numbers under the Values column, success!
If not, double-click the Address of the cheats and confirm that the .EXE file under Pointer matches the .EXE at the top of Cheat Engine's window. If the Address is "WinKawaks.EXE" but the window says "WinKawaks 1.65.EXE", you'll have to add that "1.65" to it!

This code will modify the object ID of the prisoner partway into Mission 1, after defeating the Landseek and R-Shobu, but only when it is off-screen, before it has 'loaded' into the level; no change will occur while the object is on-screen.

"Obj ID" is the core object, while "Obj Sub ID A", "B", etc., are modifiers that vary from object to object; some will change enemy behaviour, some determine what objects crates and prisoners are holding, movement speed, direction, and other properties.
The Obj ID increases in increments of 4 - setting the value to anything in between will crash or freeze the game.
For best results, make a save state after defeating the camel so you can quickly change values, and set all Sub IDs to 0.

ID: 728


The CEO/president hostage first encountered in Metal Slug 3. Although the sound effect can be found in the sound test, he does not say his signature "hi!", nor does he count towards the prisoner tally. He also can't be freed from his bonds with a melee attack, the player only uses their gun.

ID: 768


The Ostrich Slug! It functions largely as it should, though its vulcan cannon keeps flashing for some reason. It doesn't jump as high nor get a speed boost when jumping, unlike its future appearances.

ID: 772


The Elephant Slug! It walks slower than in Metal Slug 3, but its Slug Attack is faster. There's no means of testing whether its fire breath attack is functional.

ID: 776


The Slug Copter! Its bombs drop in very shallow arcs and cannot be dropped as quickly in succession; they also produce a different explosion than in its later appearances. Its vulcan cannon fires rectangular shots, not ovaloid.

ID: 780


The Slug Mariner! It also fires rectangular shots, rather than the small shots that are impaired by gravity. Its animation when resetting to neutral after moving are slower than in Metal Slug 3. You cannot exit the vehicle once you have entered, and there is no Slug Attack to make it self-destruct.

ID: 784


The Drill Slug! It has no collision detection for enemy attacks, and its Slug Attack has it slowly accelerate ala the Metal Slug, unlike its proper debut where it shoots forward like a rocket.

ID: 792


The Rebel LV Armor! All the graphics are present, but it's otherwise not in good shape. Its animations and movements are slow with staggering amounts of wind-up, and it has no visual reaction to damage. It will play its firing animation but cannot fire any guns, except for its cannon. Its Slug Attack also features a wind-up, and retains the rider inside its cockpit, meaning it looks like there are two Marcos on-screen!

ID: 1184


The Japanese soldiers retain their suicide attacks, but use a different explosion and do not damage the player. Setting Sub-ID E to "1" will make them instantly retreat after landing, with a cartoonishly fast running animation.
Notably, almost all MS3 enemies will drops item upon defeat by default; Sub-ID C will change their item. This is probably placeholder code they'd finetune during showtime.

ID: 1204


A small jellyfish. Can be shot and destroyed, but otherwise appears non-functional.

The IDs below are listed in decimal.

0 Di-Kokka
12 Melty Honey
24 boat (MS1 mission 2 leftover)
28 boat with deckchair soldiers (MS1 mission 2 leftover)
32 side of building (MS1 mission 2 leftover)
36 Landseek
40 Landseek
44 Iron Iso
48 Iron Iso
52 Iron Iso
56 motorcycle with sidecar & rocket launcher
60 motorcycle with sidecar & rocket launcher
64 suicide biker
68 suicide biker
72 suicide biker
76 suicide biker
80 wheelie biker
84 ?
88 Girida-O
116 ?
120 soldier - bazooka
148 ?
152 ?
156 soldier - shield
168 ?
172 frogman (MS1 leftover?)
176 Ajirabian swordsman
200 Mars People - grey
208 biker
212 biker + rocket
216 Landseek
220 Girida-O
224 Keesi (mission 3 sub-boss)
228 Aeshi Nero (mission 2 boss)
232 Dragon Nosuke (mission 3 boss)
236 Big Shiie (mission 4 boss)
240 Hozmi (mission 5 boss)
244 (mission 6 boss?)
248 ?
252 Hairbuster Riberts (MS1 mission 2 leftover)
256 ?
260 Tani Oh (MS1 mission 3 leftover)
264 Shoe (MS1 mission 4 leftover)
268 Karn (MS1 mission 4 leftover)
272 Karn (MS1 mission 4 leftover)
276 Iron Nokana (MS1 mission 5 leftover)
280 rocket
284 Hairbuster Riberts (MS1 mission 6 leftover)
288 Hairbuster Riberts (MS1 mission 6 leftover)
292 wall cannon (MS1 mission 5 leftover)
296 alert tower (MS1 mission 1 leftover)
300 ?
304 ?
308 ?
312 ?
316 ?
320 letter
324 rock trap (MS1 mission 1 leftover)
328 wooden platform (MS1 mission 1 leftover)
332 ?
336 electricity pylons (MS1 mission 2 leftover)
340 clock (MS1 mission 2 leftover)
344 Rebel flag (MS1 mission 2 leftover)
348 lamp post (MS1 leftover)
352 soldier on toilet (MS1 mission 3 leftover)
356 soldier cookout
360 plane flying in from background (MS1 leftover?)
364 Satiko Suzuki (MS1 leftover)
368 bird
372 well (mission 4)
376 well (mission 4)
380 ?
384 ?
388 long rocket - right (mission 6)
392 long rocket - left (mission 6)
396 rocket - right (mission 6)
400 rocket - left (mission 6)
404 well (mission 4)
412 ?
416 ?
420 mummy - static
424 mummy - spawns on left
428 mummy - attacking digger
432 digger
436 digger w/ item
440 rebel speedboat
448 soldier - deckchair & soda
452 soldier - deckchair & newspaper
456 running man - pants fall down when shot (MS1 leftover??? unused??)
464 Abul Abbas - commanding soldiers
488 Masknell helicopter
496 CRASH
500 mummy gate
504 CRASH
508 CRASH
512 pottery cart
516 Duke Koudou + Ajirabian barterer
520 Sarubia w/ item
524 MV280B jeep
528 M-15A Bradley
532 bus
536 explorer (mission 2)
540 spawning item
544 box w/ item
548 treasure chest w/ item
552 soldier - mortar
556 Ajirabian soldier - charging
560 Ajirabian soldier - standing
564 sewer mutant - exploding
568 sewer mutant - on wall, exploding
572 CRASH
576 DANGER TNT barrel, prompts mission complete when destroyed?
580 train carriage outer door? (mission 3)
584 ?
588 rock that destroys platform (mission 2)
592 baby
596 CRASH
600 gold bat - flies up
604 gold bat - flies down
608 bat with pot
612 R-Shobu
616 cannon towers (mission 1)
620 car (mission 5)
624 taxi
628 sniper soldier
640 Allen O'Neill
644 sandbags
648 plane (MS2 mission 4 leftover?)
652 crank w/ 5 Heavy Machine Guns)
656 road sign (mission 5?)
660 rocky wall-side (bg detail?)
664
668 train alert lights
672
676
680 destructible wall (mission 1)
684 sign (mission 1)
688 invisible slope?
692 fluttering shop banner (mission 1)
696 fluttering shop banner (mission 1)
700
704 arrow signpost
708
712 POW - tied up
716 POW - hanging
720 POW - tied to post
724 POW - travels left
728 CEO (MS3 leftover)
732 Rumi Aikawa - fleeing
736 mummified explorer
740 POW
744 blue jewel
748 Metal Slug
752 Metal Slug Type-R
756 Camel Slug
760 Slug Flyer
764 Slugnoid
768 Ostrich Slug (MS3 leftover)
772 Elephant Slug (MS3 leftover)
776 Slug Copter (MS3 leftover)
780 Slug Mariner (MS3 leftover)
784 Drill Slug (MS3 leftover)
788 mounted turret (MS1/MS3 leftover)
792 LV Armor (MS3 leftover)
796 soldier - grenade
800 ?
804 soldier - jump with knife
808 soldier - bottle rocket
812 soldier - rolling bomb
820 train
824 camel
828 ?
832 truck (mission 1)
836 Duke Koudou & little kid (Mission 4)
840 Landseek (friendly, mission 6)
844 pipe ceiling (mission 6)
848 ?
852 log structure (ms1 leftover?)
856 fruit cart bg detail
860 ?
864 ?
868 ?
872 ?
876 ?
880 soldier - cowering
884 soldier - hanging on
888 truck (mission 4)
892 dead scientist (mission 5)
896 dead scientist (mission 5)
900 dead scientist (mission 5)
904 landlocked boat (MS2 leftover)
908 CRASH
912 concept art (credits)
1104 concept art (credits)
1108 MV280B jeep
1112 soldier
1116 POW
1120 ?
1124 ?
1128 Ajirabian soldier - standing
1132 ?
1136 plane
1140 ?
1144 Mars People - leap in, grey
1148 ?
1152 treasure chest
1156 mummy - rising from ground
1160 mummy - rises on left
1164 mummy - rising from ground
1168 mummy - rising from ground
1172 mission complete prompt
1176 ?
1180 ?
1184 Japanese soldier (MS3 leftover)
1188 Japanese soldier (MS3 leftover)
1192 Japanese soldier (MS3 leftover)
1196 Japanese soldier - retreats (MS3 leftover)
1200 ?
1204 jellyfish (MS3 leftover)
1208 snail (MS3 leftover)
1212 ?
1216 man-eating plant (MS3 leftover)
1220 ?
1224 flying piranha w/ item - right (MS3 leftover)
1228 flying piranha w/ item - left (MS3 leftover
1232 flying piranha barrel (MS3 leftover)
1236 mummy dog - static
1240 mummy dog - walking
1244 mummy dog - bouncing
1248 Japanese plane (MS3 leftover)
1252 deadly moth (MS3 leftover?)
1256 CRASH
1260 truck dropping girders (MS1/MS3 leftover? i forget)
1276 cannon tower (MS1 mission 4 leftover)
1280 cannon tower (MS1 mission 4 leftover)
1284 cannon tower (MS1 mission 4 leftover)
1288 cannon tower (MS1 mission 4 leftover)
1292 cannon (MS1 mission 4 leftover)
1296 cannon (MS1 mission 4 leftover)
1300 Bull Chan (MS1 leftover - CRASH)
1304 Rebel submarine (MS3 leftover)
1308 Rebel long submarine (MS3 leftover)
1312 Rebel long submarine (MS3 leftover)
1316 bomb diver (MS3 leftover)
1320 sea mine - explodes instantly (MS3 leftover)
1324 sea mine - explodes instantly (MS3 leftover)
1328 mounted camera (MS3 leftover)
1332 mummy descending on rope
1356 mummy hanging on rope
1364 laser camera (MS3 leftover)
1368 crab item (MS3 leftover)
1372 platform with arrow (mission 2)
1376 big platform with arrow (mission 2)
1380 platform with arrow (unused?)
1384 big platform with arrow (unused?)
1388 crate platform (MS3 leftover?)
1392 bigger crate platform (MS3 leftover?)
1396 yellow soldier
1400 building destruction transition effect (MS1 mission 3 leftover)
1404 spawning item
1408 Mars People UFO
1412 Mars People UFO
1416 ?
1420 suicide biker
1424 suicide biker
1436 water drops BG detail?
1440 smoke trail
1444 smoke trail
1448 elevator down (MS3 leftover)
1452 parachute platform (MS3 leftover?)
1456 parachute platform (MS3 leftover?)
1460 blimp platform (MS3 leftover)
1464 blimp platform (MS3 leftover)
1468 ?
1472 Ajirabian soldier on camel
1476 ?
1480 Girida-O
1484 ?
1488 R-Shobu
1500 ?
1504 CRASH


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