To unlock the secret Xevious stage in NAMCO LEGENDARY Mountains, you must first collect four hidden Solvalou Fragments scattered across the game's major peaks. These are located in the Galaga Hive, Pac-Maze of Madness, Dig Dug Depths, and the Tower of Druaga. With all four fragments, you must find the GAMP Altar in the Central Core hub and input a secret flight pattern on the floor grid to open a portal to the retro shooter challenge.
This isn't just a simple easter egg; it's a full-fledged, brutally difficult tribute to the 1983 arcade classic, rendered in the Legendary Mountains engine. Completing it awards some of the most powerful and unique gear in the game, making the arduous journey well worth the effort. This guide breaks down every single step, from the location of the first fragment to the final shot on the Andor Genesis mothership.
First, What Exactly Is the Xevious Stage?
This hidden level, internally called "Assault on the Andor Genesis," is a top-down, vertically scrolling shoot-'em-up that completely changes the game's core mechanics. Instead of the typical third-person action of NAMCO LEGENDARY Mountains, you pilot the iconic Solvalou starfighter. You have access to its classic armaments: a forward-firing Zapper for aerial targets and a Bomb sight for ground installations. The stage faithfully recreates the look and feel of the original arcade game, complete with modern graphics and enemy designs based on the classic sprites.
Enemies like the endlessly spinning Toroids, the evasive Zoshi fighters, and the dreaded Zakato ground cannons all make an appearance. The level culminates in a massive, multi-phase boss fight against the iconic Andor Genesis mothership. The primary reason to tackle this challenge is the reward: the Sol-Zapper, a legendary energy weapon for your main character, and the Solvalou Pilot cosmetic armor set. It is a true test of skill designed as the ultimate homage for long-time Namco fans.
The Four Solvalou Fragments: Locations and Strategies
The entire quest begins with finding four key items. Each is hidden deep within one of the four main themed mountains of the game. They don't appear on the map and are often guarded by unique enemies or hidden behind environmental puzzles. Here is the location of each fragment.
NAMCO LEGENDARY Mountains in-game screenshot
| Fragment Name | Mountain Location | Specific Area | Notes & Strategy |
|---|---|---|---|
| Fragment of the Zapper | Galaga Hive | Sector 4, Queen's Chamber | Behind the Queen's throne, requires defeating the Galaga Queen boss. A small shimmer gives it away. |
| Fragment of the Wings | Pac-Maze of Madness | The Power Pellet Shrine | In the central maze chamber, you must consume the four Power Pellets to make the ghost guardians vulnerable and reveal the fragment. |
| Fragment of the Blaster | Dig Dug Depths | Level 16, Pooka's Nest | After inflating the giant Pooka boss, the fragment is found inside the treasure chest it drops. The chest is trapped, so be ready to dodge. |
| Fragment of the Core | Tower of Druaga | Floor 60, Blue Knight's Hall | This is the final fragment. It's held by the Blue Crystal Knight. You must defeat him without taking damage to make him drop it. |
Fragment of the Zapper (Galaga Hive)
Deep within the insectoid tunnels of the Galaga Hive, you'll fight your way to the Queen's Chamber in Sector 4. After the intense boss battle against the Galaga Queen, who uses dive-bombing attacks reminiscent of the arcade ships, don't leave immediately. Walk behind her now-empty throne. A faint, silvery distortion in the air marks the fragment's location. Interact with it to claim the Fragment of the Zapper.
Fragment of the Wings (Pac-Maze of Madness)
This fragment is located in the chaotic, shifting labyrinth of the Pac-Maze. In the large central chamber known as the Power Pellet Shrine, you'll be hounded by four spectral guardians who are invincible. Your goal is to find and consume the four glowing Power Pellets located at the corners of the room. Each one you consume will temporarily allow you to damage the ghosts. Once all four are defeated, the Fragment of the Wings will materialize in the center of the shrine.
Fragment of the Blaster (Dig Dug Depths)
On Level 16 of the Dig Dug Depths, you'll encounter a boss room containing a grotesquely oversized Pooka. Using the environment's air pumps—a nod to the original game mechanic—you must inflate and pop the creature. Upon its defeat, it drops a large, ornate treasure chest. The Fragment of the Blaster is inside, but be warned: opening the chest triggers a dart trap from the walls. A quick dodge is necessary to secure the prize without taking heavy damage.
Fragment of the Core (Tower of Druaga)
Arguably the most difficult fragment to obtain, this piece is held by the Blue Crystal Knight on the 60th floor of the Tower of Druaga. This is the same location where you find the legendary Blue Knight armor. The knight is a formidable foe with fast, unblockable attacks. To get the fragment, you must achieve a flawless victory. If you defeat him without taking a single hit, he will shatter into a thousand crystals, leaving behind the Fragment of the Core.
Activating the GAMP Altar
Once you have all four Solvalou Fragments, they will automatically combine in your inventory to form the "GAMP Emblem," a silver medallion shaped like the Solvalou ship. Your next destination is the Central Core, the game's main hub world. Head to the large waterfall behind the main plaza, near where the character Mappy gives his quests. You can walk directly through the waterfall to find a hidden cave.
Inside is a large, circular chamber containing a raised dais. This is the GAMP Altar (an acronym for "Game Amusement Machine Preservation"). In the center of the altar is a square grid of 16 pressure plates (4x4). Placing the GAMP Emblem on the pedestal in front of the grid will cause the plates to glow with a faint green light, indicating the puzzle is ready.
NAMCO LEGENDARY Mountains in-game screenshot
The Nazca Line Code: Solving the Final Puzzle
The key to unlocking the portal is to trace a specific pattern on the 4x4 grid by stepping on the pressure plates. The pattern is a direct reference to the iconic Nazca line-style geoglyphs seen on the ground in the original Xevious. The correct sequence is hinted at by a barely-legible carving on the wall behind the altar, which reads: "Fly the bird's path, then strike the heart."
This translates to a two-part sequence. You must first trace the shape of the "bird" geoglyph, then perform a button input.
Part 1: The Flight Path Stand on the bottom-left tile to begin. You must step on the tiles in this exact order without touching any other tile:
- Move UP one tile.
- Move UP one tile again.
- Move RIGHT two tiles.
- Move DOWN one tile.
- Move LEFT one tile.
- Move DOWN one tile.
This traces the iconic bird shape. If done correctly, the grid will flash yellow.
Part 2: Strike the Heart While standing on the final tile of the sequence, you must perform a specific three-button combo:
- Press the Light Attack button.
- Press the Heavy Attack button.
- Press the Light Attack button again.
This Zapper-Bomb-Zapper sequence is the final key. If both the path and the button combo are correct, the entire altar will shake violently, and a shimmering silver portal will open in the center of the grid. Stepping through it will transport you to the Xevious stage.
Surviving the Flight: A Xevious Stage Walkthrough
As soon as you enter, you are in the cockpit of the Solvalou. The controls are simple: left stick for movement, one button for the aerial Zapper, and one for the ground Bomb. The stage is relentless. Waves of Toroid fighters will swarm you, while ground cannons (Bara) and pyramids (Sol) fire from below. Your top priority is spatial awareness. Always be moving to avoid the dense bullet patterns.
Your Bomb reticle is always slightly ahead of your ship. This takes some getting used to. You must lead your ground targets, dropping bombs preemptively to destroy them as you fly over. The most dangerous ground targets are the hidden Sol Citadels, which only become visible when your Bomb reticle passes over them. Destroying all of them in a run is tied to a special commendation.
NAMCO LEGENDARY Mountains in-game screenshot
The final confrontation is with the Andor Genesis mothership. This fight has three phases:
- Destroy the Outer Defenses: You must first destroy the four large, rotating laser cannons on the ship's exterior. They have a predictable firing pattern, so weave between the beams and focus your fire on one at a time.
- Expose the Core: Once the cannons are down, the ship's central plate will retract, revealing the glowing red core. However, it's protected by an energy shield. To disable it, you must bomb four smaller generators on the ship's surface.
- Annihilate the Core: With the shield down, the core is vulnerable to your Zapper. It will unleash a terrifying bullet-hell pattern. This is a pure test of dodging. Stay near the bottom of the screen to give yourself maximum reaction time and unload everything you have into the core.
Upon its destruction, the mothership will explode in a spectacular fashion, and you will be automatically transported back to the GAMP Altar.
The Spoils of War: All Xevious Stage Rewards
For your incredible display of piloting skill, you receive a treasure chest containing three exclusive items:
- Sol-Zapper (Legendary Weapon): A high-tech energy rifle that fires fast-moving bolts of light. Its unique property is that every eighth shot is an explosive blast that also hits a small area on the ground below your target, mimicking the Zapper/Bomb combo.
- Solvalou Pilot Set (Cosmetic Armor): A sleek, silver-and-blue flight suit styled after the original pilot's gear. It offers no special stats but is one of the most stylish outfits in the game.
- "Friend of GAMP" Trophy/Achievement: A gold-tier achievement for discovering and completing Namco's greatest secret.
These rewards cannot be obtained anywhere else in the game, making them the ultimate prize for dedicated explorers and completionists.
Frequently Asked Questions
Can I replay the Xevious stage? Yes. After completing it once, you can return to the GAMP Altar at any time to reactivate the portal and try for a better score or a flawless run.
What happens if I die in the Xevious stage? If your Solvalou is destroyed, you are simply ejected from the portal and returned to the GAMP Altar. There is no penalty, and you can try again immediately.
Do my character's stats or gear affect the Solvalou? No. The Xevious stage is a completely self-contained challenge. The Solvalou has fixed speed, firepower, and health. Your success is based purely on skill, not your character's level or equipment.
Is the Sol-Zapper the best weapon in the game? It is a top-tier weapon for its speed and unique area-of-effect property. While some late-game boss weapons may have higher raw damage output, the Sol-Zapper's versatility and consistency make it one of the best all-around weapons for the entire game, especially against large groups of enemies.
A Worthy Tribute
The secret Xevious stage in NAMCO LEGENDARY Mountains is more than just an easter egg; it's a lovingly crafted and brutally challenging homage to one of the most important games in arcade history. It respects the player's intelligence by hiding the solution behind a multi-layered, thematic quest that requires exploration, puzzle-solving, and combat prowess. Unlocking it is a rite of passage, and the rewards are a fitting tribute to the legacy of the Solvalou.