Metal Slug XX (reads Metal Slug Double X) is an enhanced modification of Metal Slug 7.
Metal Slug XX was released in December 2009 for the PlayStation Portable and Xbox Live Arcade with new content. These are backwards compatible with the PlayStation Vita, Xbox One, and Xbox Series X|S consoles, respectively.
A remastered version for the PlayStation 4 was released on May 29, 2018 and for Steam on January 31, 2019; the former is also compatible with the PlayStation 5.
New Features and Differences[]
Presentation[]
- The screen and graphics are not re-dimensioned to fit the screen. Additionally, the player can select the aspect ratio of the screen:
- 4:3 (Regular aspect ratio with designed borders at left and right of the screen)
- Wide (Fullscreen with the graphics stretched)
- Clear (Classic Neo Geo aspect ratio)
- Rebel Infantry reuse their sound effects from Metal Slug 6 (except for Xbox versions).
- Mission 1 and Mission 6 take place in different times of day.
- A new announcer; bits and pieces of the previous announcers can be heard.
Gameplay[]
- Old enemies reappear again such as the Mars People and the Hunters.
- Change in items, Slugs, and enemy placement. The Ostrich Slug is added in this version.
- Infinite continues to all difficulties.
- Reintrodution of multiplayer mode by using ad hoc and online services. Unlike previous games, there is no drop-in multiplayer.
- Implementation of Hidden Routes:
- Mission 1
- Hunter Hideaway: There should be a pitfall/hole before the Di-Cokka and the DANGER barrel. Go there and fight the Hunters.
- Mission 5:
- Deeper Ruins: When reaching the end of the second part of the stage, it says GO right. Instead, go left until finding a Warp Base. Get in the Base and fight UFOs and tons of soldiers.
- Mars People Hallway: Just like the previous entrance but do not go in the Base. Jump over it. Hordes of Mars People are fought there.
- Mission 1
- Altered challenges and ranking table in the Combat School mode. The Item Collection challenges are replaced by the returning Survival challenge and Super Devil rank. Players can switch characters without quitting back to the challenge list.
Leona Heidern[]
 |
Leona Heidern is a downloadable character (costs $0.99). She has several gameplay benefits: |
- Her Special Action is the Moon Slasher. It can tear down enemies and machinery with higher damage than grenades. It can also nullify projectiles.
- Vehicle Slugs' health is increased from three to four hits.
- 20% more ammo on any weapon crate.
- 20% more grenades/firebomb. Leona's grenades are her Earring Bombs.
- Leona keeps her weapons upon death. She loses them when continuing.
Xbox Versions Exclusives[]
- Achievements (12)
- Sound Adjustments:
| Sound | Xbox Versions | PlayStation/Steam Versions |
|---|---|---|
| Leona Death | ||
| "Final Misson" |
- Leona uses a unique death cry rather than using her old King Of Fighters defeat sound.
- The new announcer shouts "Final Mission Start" instead of the Metal Slug 6 announcer.
- The Rebels use their old Neo Geo yells.
PlayStation 4/PS5/Steam Exclusives[]
- Leona Heidern available from the get-go (no purchase required).
- 4K and 1080p resolution. The characters in the menu screen have been redrawn.
- New borders for the Clear and 4:3 aspect ratios.
- Scanlines to simulate CRT and Arcade screens.
- PlayStation trophy support (30 including a Platinum).
- Steam achievements (34)
Weapon Ammo Breakdown[]
Weapon
|
Beginner
|
Normal/Hard
| ||||||
|---|---|---|---|---|---|---|---|---|
| Others | Fio | Ralf | Leona | Others | Fio | Ralf | Leona | |
| Heavy Machine Gun | ∞ | ∞ | ∞ | ∞ | 200 | 300 | 100 | 240 |
| Rocket Launcher | 60 | 90 | 30 | 72 | 30 | 45 | 15 | 36 |
| Shotgun | 60 | 90 | 30 | 72 | 30 | 45 | 15 | 36 |
| Flame Shot | 60 | 90 | 30 | 72 | 30 | 45 | 15 | 36 |
| Laser Gun | 400 | 600 | 200 | 480 | 200 | 300 | 100 | 240 |
| Enemy Chaser | 80 | 120 | 40 | 96 | 40 | 60 | 20 | 48 |
| Iron Lizard | 60 | 90 | 30 | 72 | 30 | 45 | 15 | 36 |
| Drop Shot | 60 | 90 | 30 | 72 | 30 | 45 | 5 | 36 |
| Super Grenade | 40 | 60 | 20 | 48 | 20 | 30 | 10 | 24 |
| Two Machine Guns | 600 | 900 | 300 | 720 | 300 | 450 | 150 | 360 |
| Zantetsu Sword | 20 | 30 | 10 | 24 | 10 | 15 | 5 | 12 |
| Thunder Shot | 40 | 60 | 20 | 48 | 20 | 30 | 10 | 24 |
Default Controls[]
All versions include auto-fire (off by default) and allow button combinations to be set to a single button.
On-Foot[]
| Action | PSP/Vita | Xbox 360/One | PS4 |
|---|---|---|---|
| Shoot | Square | X | Square |
| Jump | X | A | X |
| Grenade | Circle | B | Circle |
| Change Weapon | R | RB | R |
| Special Melee Attack | L + Square | RT
LB + X |
L1 + Square |
| Throw Weapon | L + Circle | LT
LB + B |
L1 + Circle |
| Special Action | Up + L + Square | Y
Up + LB + X |
Up + L1 + Square |
Slug[]
| Action | PSP/Vita | Xbox 360/One | PS4 |
|---|---|---|---|
| Shoot | Square | X | Square |
| Jump | X | A | X |
| Exit Slug | Down + X | Down + A | Down + X |
| Cannon | Circle | B | Circle |
| Grenade | Down + Circle | Down + B | Down + Circle |
| Frontal Attack | L | LB
X + A* |
L1 |
* This button combination is turned off by default.
Trivia[]
- Metal Slug XX is the third installment in the series to increase the number of playable characters, from six to seven with the addition of Leona.
- Metal Slug XX is the first game since Metal Slug: 2nd Mission where the game's announcer shouts the game's title.
- Using Leona (as well as most PSP downloadable content) in the PlayStation Vita requires purchasing the DLC in the PS store's website and using a PS3 to download and transfer the data to the Vita via cable.
Screenshots[]
Metal Slug Double X Title
Taking a secret route in the first mission
Using the Slug Armor in the third mission
Using the Ostrich Slug in the fourth mission
Playing with Leona
Mission 1 Alternate Route Entrance
Mission 5 Alternate Entrance 1
Mission 5 Alternate Entrance 2
Covers[]
PSP Cover