Metroid II: Return of Samus

Metroid II: Return of Samus (メトロイドII RETURN OF SAMUS, Metoroido Tsū Ritān Obu Samusu) is the sequel to Metroid, the second game in the Metroid series, and the only one to appear on the Game Boy. It is about Samus Aran's mission to exterminate the Metroids on their home planet, SR388. Although it is the second release in the series, chronologically it takes place after Metroid Prime 3: Corruption and before Super Metroid.

Plot
Some time has passed since Samus Aran put a stop to the Space Pirates on Zebes and their plans to use the newly-discovered Metroids for evil purposes. To ensure this will not happen again, the Galactic Federation sends a research ship to the Metroid homeworld, SR388, to annihilate the species. When contact with the ship is lost, a rescue team and combat squad are sent, one after the other, to investigate, though none come back alive.

Realizing the threat that the Metroids pose, the Galactic Federation sends Samus Aran on a mission to land on SR388 and destroy all Metroid organisms. With her experience on Zebes, the Galactic Federation is sure she will succeed.

Arriving, Samus lands her gunship at the base of an active volcano, near the only entrance to the Metroid lair. She exits her ship and begins the difficult trek through the planet's dark network of caves and ruins. One by one, Samus hunts down and destroys each Metroid on the planet. As she does so, she takes note of the steady mutation that each goes through. She discovers Metroids in stages of growth from the small jellyfish-like state into massive, hovering lizard-like beasts. As Samus travels deeper and deeper, the volcano rumbles at intervals and the lava drains, revealing a massive complex of Chozo ruins. Finally, after several harrowing battles with massive Omega Metroids, she uncovers a small ruined royal palace with just-hatched infant Metroids floating in the breeze. With their destruction, only one Metroid remains — the massive and deadly Queen Metroid. Samus fights a final battle before finally defeating the slithering monster, and as it crumbles to dust the final volcanic eruption sputters out. Returning to her gunship, Samus comes across a Metroid egg. The egg hatches and before her eyes a small Metroid hatchling floats out of the broken shell and begins to chirp at her. The Metroid, upon seeing Samus, believes her to be its mother. Samus, despite being ordered to exterminate the Metroids, spares its life. The two continue towards the surface, and the Metroid hatchling helps Samus escape the caverns. Samus and the young Metroid board the gunship, ending the game.

Onboard the gunship, Samus places the Metroid in a container so that it cannot cause any harm to the ship. Noting the immense scientific opportunity that the captured hatchling poses, she departs SR388 and heads to Ceres Space Colony to deliver her groundbreaking find — a domesticated, baby Metroid.

Gameplay
Gameplay is similar to other 2D Metroid games. However, Metroid II is more straightforward in the sense that advancement through the levels is not strictly controlled by item acquisition as in the other games, but by killing a certain number of Metroids in the area. Once they are destroyed, an earthquake occurs and SR388's Lava levels decrease, allowing Samus to travel deeper through its maze-like tunnels.

Like Metroid, Metroid II contains no in-game map. Where it differs, however, is the map being made of multiple, discontinuous sections that produce a "scene fade" effect when crossing (similar to riding elevators in other games). These sections do not fit together in a flat, 2-D pattern, making the 2-D space of the map "twisted". It is the first game of the Metroid series to do so. Metroid Fusion and Metroid: Zero Mission later use this method, even while retaining an in-game map. Also unique to the game is the Metroid Detector, which displays the number of Metroids left on the planet. It is also the first in the series to utilize Save Stations, located in various points around the planet.

Areas
Note: All names below come from official walkthroughs in Nintendo Power, and are not named ingame.
 * Phase 1
 * Phase 2
 * Phase 3
 * Phase 4
 * Phase 5
 * Phase 6
 * Phase 7
 * Phase 8
 * Phase 9

Items and abilities
Rather than being the first items she finds as in most Metroid games, Samus begins her mission with the Morph Ball, the Long Beam, and a small number of Missiles. The Ice Beam and Wave Beam return as upgrades, as well as the Bombs, the Varia Suit (known in the game as "Varia" and in the manual as the "Barrier Suit" ), the High Jump Boots, and the Screw Attack. In addition, Metroid II introduced new items into the series, some of which have been in almost every game since. The game features two new weapons: the tri-splitting Spazer Laser Beam (identified in-game as the "Spazer", though later changed to "Spazer Beam" in Super Metroid), and the super-powerful Plasma Beam that pierces through enemies. As in Metroid, only one beam can be equipped at a time, though Samus can switch between them by collecting the beam she wants to use again.

The Space Jump also debuts in this game, which allows Samus to spin-jump repeatedly in the air, allowing her to access otherwise unreachable areas. The Screw Attack can be used in conjunction with the Space Jump to shred through almost everything.

New upgrades were given to the Morph Ball. The Spider Ball made its debut in Metroid II and would later appear again in Metroid Prime and subsequent sequels. The Spider Ball allowed Samus to climb any wall or ceiling. The Spring Ball was also introduced, which gives Samus the ability to jump while in Morph Ball form.

List of items in Metroid II: Return of Samus

Metroid lifecycle
Metroid II and Metroid Fusion are the only Metroid games that show the assumed natural transformations of the Metroids, but Metroid II remains the only game in which Samus fights every one of them. The life cycle is in the following order:
 * 1) Metroid
 * 2) Alpha Metroid
 * 3) Gamma Metroid
 * 4) Zeta Metroid
 * 5) Omega Metroid

The more powerful Metroids are found further into the game, with the Queen Metroid being the final boss.

Endings
After the credits are displayed at the end of the game, the total time the player took to complete the game will be displayed. During the credits, Samus is shown running on the screen. Depending on the completion time, a certain ending will be achieved, all of which are shown below:

Development
Metroid II marked a "new high point" for handheld game consoles, with graphics that were almost as good as the 8-bit graphics in games for the Nintendo Entertainment System. The game was the first in the series to feature a battery backup to allow players to continue their games from a previously saved point. Metroid II was designed by Nintendo R&D1 and produced by Gunpei Yokoi; they both also worked on the previous Metroid game. Metroid II was released as the second game of the series, but it is chronologically the sixth in the overall story. The game features enhancements from its predecessor that include easier controls which allow Samus to crouch while firing at the same time, and jump while shooting straight down to attack anything below her.

The Game Boy's black and white graphics limited the detail in each area of the game, which forced changes to Samus' appearance, which would later be used for the rest of the series. In the original Metroid on the NES, Samus' suit would change color to show the difference between Samus's Power and Varia Suits. However, without color on the Game Boy, the two suits appeared the same. This forced the developers to create a visual indicator for players to determine which suit Samus was wearing. They updated her Varia Suit, adding round, bulky metal shoulders that have been a part of the suit in every game in the series since then. Even though the game cartridge for Metroid II has six times less memory than its predecessor on the Nintendo Entertainment System, the game allowed players to save their progress for the first time in the series. To save the game, players would step on save modules, which have appeared in every Metroid game since. Metroid II and Metroid Fusion are the only games in the entire series to show the natural life cycle of the Metroids. Because of the Game Boy's small screen, the developers made Samus's model bigger compared to her surroundings, to give more detail in her appearance using limited graphics capabilities. While improving Samus's design, the change also made the environments feel cramped.

Reception
Metroid II is more linear than Metroid, since most areas are blocked off until a certain number of Metroids are killed. It received good reviews when it was released nonetheless — Nintendo Power gave it a 4.5/5 and most gaming magazines and websites have a similar opinion.

In spite of this, some critics and gamers consider it the weakest title of the series, compared to Super Metroid or Metroid Fusion. In retrospect, it is often viewed merely as a connection between the first and third released titles and as an expansion on Metroid morphology. Still, it was later repackaged in a gold colored box along with the official Player's Choice emblem, showing it was well-received by many.

Color version and fan remakes
A color version titled Metroid II: Return of Samus DX was announced in 1999 shortly after the release of the Game Boy Color. Dan Owsen of Nintendo claimed its color-palette needs were even taken into account in the design of the Game Boy Color hardware. Some pictures were shown but the game never saw the light of day despite the release of the colorized version of The Legend of Zelda: Link's Awakening, much to the disappointment of some Metroid fans.

Since then, many internet users have taken the time to "colorize" the game, and numerous IPS patches to add colorized graphics to the game are now available through the internet. The unofficial Metroid II DX games completely revamps the graphics by adding full Game Boy Color palette color to the game. Some users have even taken the initiative to start campaigns for a full remake of the game, or make their own remakes.

Like all original Game Boy games, the Metroid II cartridge is also compatible with the Super Game Boy accessory for the SNES, manually remapping the color scheme to a maximum of four different colors. Additionally, the Game Boy Player accessory for the Nintendo GameCube automatically colorizes the game, but not true full color, as it is still limited to the same colorization techniques of the GBC and GBA.

Trivia

 * Metroid II: Return of Samus is the only game in the Metroid series that does not have a Countdown at the end of the game.
 * With a total of 40 boss battles, Metroid II: Return of Samus has the most boss battles in the Metroid series.
 * Interestingly, the lack of color in Metroid II had some long-term effects on Samus' appearance. In Metroid, the Varia Suit was a different color from the normal Power Suit, but the same shape. In Metroid II, the Varia Suit had to have a different shape because there was no color. Thus, the Varia Suit gained the extra armor plating and bulky, round shoulder pads that have become its most recognizable traits. In addition, rather than Samus' arm cannon and visor changing color to distinguish between "Beam Mode" and "Missile Mode", the end of the arm cannon tip moved outward and back to show that the "missile hatch" was open. These graphical changes have been used in all Metroid games since Metroid II.
 * Metroid II: Return of Samus is one of three Metroid games without Ridley, the other two being Metroid Prime Hunters and Metroid Prime 2: Echoes. It is also the only game in the series to not have any Space Pirates in it at all.
 * Metroid II: Return of Samus is the only Metroid game not playable on a current-gen console in some form, excluding emulators. The most recent console that would play it was the Game Boy Advance SP. The Game Boy Advance Micro, although a Game Boy, cannot play anything other than Advance games.
 * Metroid II: Return of Samus is the only Metroid game that never had one of its songs remixed in a future game and had no remixed songs in its own game (apart from the Title and Samus Aran's Appearance Fanfare).
 * The Super Game Boy Player's Guide has suggested color palettes to use throughout the game if playing with a Super Game Boy. It was given out with issues of Nintendo Power around the time of the Super Game Boy's release.
 * Certain aspects of this game are similar to the movie Aliens. Both involve the female protagonists (Ellen Ripley/Samus) travelling to the homeworld of the alien specimens (LV-426/SR388) to exterminate them, both depict a final battle with the queen of the creatures (Queen Alien/Queen Metroid), and both depict the female protagonists bonding with a child (in Ripley's case, it is a colonist nicknamed "Newt" while in Samus' case it is the Metroid hatchling). The escape sequence of the film also is very similar to that of Metroid Fusion.