Joystick: Use the 8-way joystick to direct your Star Fighter around the screen; it will now always be moving forward, but you can direct it anywhere.
Firing Button: Use this button to make your Star Fighter fire circular shots at the enemies; holding it down will make it fire out more powerful shots.
Pattern Selection Button: Use this button to cycle through the Star Fighter's four different varieties of firing patterns: red, blue, yellow, and green.
1 or 2 Player Buttons: Push these buttons to begin a 1 or 2 player game.
As in the original Bosconian arcade game, you must take control of the Star Fighter that the Federal Council had originally developed back in 1981 for the purposes of destroying the Enemy Bases, for a second time; it is now equipped with four different varieties of firing patterns, the colours and directions of which have been explained on that main page. It still has the ability to move in eight directions, but is now always facing the top of the screen and moving upward while the background scrolls downwards behind it and brings the enemies into view - and it must still avoid contact with every enemy (except for the Jiara and Furemu Launchers in the background of World 3-3) and every shot fired at it, or it will die and be sent back to the current area's quarter-way, half-way, or three-quarter-way checkpoint. It will also receive an extra life at every 80000 points, but this can be modified. To the left is how the Star Fighter appears at its normal size, in the first and second areas of each world, and to the right is how it will appear at its larger size in the third area of each world; the colour up at the top of it will change to blue, yellow and green each time the Pattern Selection Button is pressed.
Enemies who appear in the worlds' first areas
File:BO Kurage.gifKurage (クラゲ) - These enemies appear on Area 1-1, 2-1, 3-1 and 5-1, and will attack by flying down towards you in a zigzag pattern; 100 points.
File:BO Ika.gifIka (イカ) - These enemies appear on Area 1-1, 3-1, 4-1, 5-1 and 6-1 and will attack by flying down towards you while firing projectiles; 100 points.
File:BO Tiara.gifTiara (ティアラ) - These enemies appear on Areas 1-1, 3-1, 4-1 and 5-1, and will attack by flying down and retreating after seeing you; 100 points.
File:BO Choucho.gifChoucho (ちょうちょ) - These enemies appear on all six of the first areas and attack by flying down towards you and closing in on you; 100 points.
File:BO Jet.gifJet (ジェット) - These enemies are only on Area 1-1, and attack by flying down towards you then retreating off the top after seeing you; 100 points.
File:BO Kagerou.gifKagerou (かげろう) - These enemies appear upon Areas 1-1, 3-1 and 4-1 and attack by flying down and closing in (like the Choucho); 100 points.
File:BO Teraji.gifTeraji (テラジ) - These enemies are on Areas 1-1, 3-1, 4-1, 5-1, and 6-1, and attack by flying down towards you while firing projectiles; 100 points.
File:BO Perikan.gifPerikan (ペリカン) - These enemies appear on Areas 3-1, 4-1 and 6-1, and will attack by flying down (and retreating after seeing you); 100 points.
File:BO Tonbo.gifTonbo (トンボ) - These enemies appear on Areas 4-1 and 5-1, and attack by flying down towards you and retreating after seeing you; 100 points.
File:BO Iris.gifIris (アイリス) - These enemies will only appear on Area 4-1 and attack by flying down towards you while firing fast-moving projectiles; 100 points.
File:BO Kamo.gifKamo (カモ) - These enemies will only appear on Area 4-1, and attack by flying down towards you while firing fast-moving projectiles; 100 points.
File:BO Big Bae.gifBig Bae (大バエ) - These enemies appear on Areas 2-1, 3-1, 5-1 and 6-1, and attack by firing three bullets at you after seeing you; 500 points.
File:BO Kapuseru.gifCapsule (カプセル) - These enemies only appear on Area 3-1, and attack by firing five (blockable) missiles at you after seeing you; 500 points.
File:BO Big Egret.gifOwashi (大鷲) - These enemies appear upon Areas 3-1, 5-1 and 6-1, and attack by flying in straight lines with ninety-degree turns; 500 points.
File:BO Killer.gifKiller (キラー) - These enemies appear on Areas 3-1 and 6-1, and will attack by lining up and firing lasers at you (after seeing you); 500 points.
File:BO Baria.gifBarrier (バリア) - These enemies appear on Areas 5-1, and 6-1, and attack by simply just hovering back and forth in a fixed position; 2000 points.
File:BO Spy Ship.gifSpy Ship (偵察機) - One of very few enemies that appeared in the Bosconian arcade game, they attack by flying towards you and retreating once they have seen you; if you miss one, a Cosmo-Mine will appear. 1000 points - and the three Kanji characters in their Japan name read as teisatsu-ki.
File:BO Enemy Base.gifEnemy Base (エネミー基地) - Another enemy that appeared in the Bosconian arcade game (and in one of the backgrounds for Galaga '88), they attack by simply just rotating on their Y-axes; they're worth 1500 points, and the two Kanji characters in their Japanese name read as kichi.
File:BO Cosmo-Mine.gifCosmo-Mine (宇宙機雷) - A third enemy that appeared in the original Bosconian arcade game, they explode into eight bits of shrapnel if you miss any of the Spy Ships; they're worth 100 + 400 points, and the four Kanji characters that make up their Japanese name read as uchū tsukue kaminari.
Enemies who appear in the worlds' second areas
File:BO E-Type Missile.gifE-Type Missile (E-タイプミサイル) - A fourth enemy from the original Bosconian game, they will appear in all six of the second areas; 100 points.
File:BO E-Type Missile Green.gifGreen E-Type Missile (E-タイプミサイル・緑) - A fifth enemy of the original Bosconian title, they appear in all six of the second areas; 100 points.
File:BO Beam Launcher.gifBeam Launcher (ビーム発射口) - These enemies appear on Areas 1-2, 2-2 and 4-2, and attack by firing double bullets at you; they are worth 300 points and the three Kanji characters in their Japan name also read as hassha kuchi, also applying to the three additional types of "Launchers".
File:BO No Launcher.gifNo Launcher (の発射口) - These enemies appear on Areas 1-2, 2-2, 3-2, 4-2, and 5-2, and attack by launching "No" (File:BO No.gif) at you; 1000 points.
File:BO Missile Launcher Blue.gifBlue Missile Launcher (ミサイル発射口・青) - These enemies appear on Areas 2-2, 3-2, 4-2 and 5-2, and will fire missiles at you; 1000 points.
File:BO Missile Launcher Red.gifRed Missile Launcher (ミサイル発射口・赤) - These enemies appear on Areas 2-2, 3-2, 4-2, and 5-2, and will fire missiles at you; 1000 points.
Enemies who appear in the worlds' third areas
File:BO Tank White.gifWhite Tank (タンク・白) - These enemies appear on the third area of the first world of the game, and attack by turning to fire some slow-moving projectiles at you. 500 points.
File:BO Tank Green.gifGreen Tank (タンク・緑) - These enemies appear on the third area of the first world of the game, and attack by turning to fire some slow-moving projectiles at you. 500 points.
File:BO Beam Cannon Red.gifRed Beam Cannon (ビーム砲・赤) - These enemies appear on the third area of the second world of the game, and attack by firing shots of double bullets at you. 200 points.
File:BO Beam Cannon Light Blue.gifLight Blue Beam Cannon (ビーム砲・水色) - These enemies appear on the third area of the second world of the game, and attack by firing double bullets at you. 200 points.
File:BO Beam Cannon Blue.gifBlue Beam Cannon (ビーム砲・青) - These enemies appear on the third area of the second world of the game, and attack by firing shots of double bullets at you. 200 points.
File:BO Jiara.gifJiara (ジアラ) - These enemies appear on the third area of the third world of the game, and are launched up towards you by the Jiara Launchers in the background. 100 points.
File:BO Furemu.gifFuremu (フレーム) - These enemies appear on the third area of the third world of the game, and are launched up to you by the Furemu Launchers in the background. 100 points.
File:BO Beam Cannon White.gifWhite Beam Cannon (ビーム砲・白) - These enemies appear on the third area of the fourth world of the game, and attack by firing lasers while extending out. 300 points.
File:BO Missile Launcher White.gifWhite Missile Launcher (ミサイルを発射口・白) - These enemies appear on the third area of the fourth world of the game, and attack by firing missiles at you. 300 points.
File:BO Robot Cannon.gifRobot Cannon (ロボット砲) - These enemies appear on the third area of the fifth world of the game, and attack by turning to fire some slow-moving projectiles at you. 300 points.
File:BO Bosco Cannon Orange.gifOrange Bosco Cannon (ボスコ大砲・鈍足) - These enemies appear upon the third area of the sixth and final world of the game, and attack by flying towards you. 1000 points.
File:BO Bosco Cannon Light Blue.gifLight Blue Bosco Cannon (ボスコ大砲・水色) - These enemies appear on the third area of the sixth, and final, world of the game, and attack by flying towards you. 1000 points.
File:BO Bosco Cannon Green.gifGreen Bosco Cannon (ボスコ大砲・黄緑) - These enemies appear on the third area of the sixth and final world of the game, and attack by flying down towards you. 1000 points.
File:BO Boss Cannon.gifBoss Cannon (ボス大砲) - These enemies appear upon the third areas of all six worlds of the game, and attack by showing to fire some slow-moving projectiles at you. 500 points.
Bosses
File:BO Boss W1.gifWorld 1 Boss (ワールド1ボス) - As its name implies, this is the boss of the game's first world. It has vertical movement, four boss cannons, and is worth 3000 + 5000 points.
File:BO Boss W2.gifWorld 2 Boss(ワールド2ボス) - As its name implies, this is the boss of the game's second world. It has horizontal movement, two cannons, and is worth 3000 + 5000 points.
File:BO Boss W3.gifWorld 3 Boss (ワールド3ボス) - As its name implies, this is the boss of the game's third world. It has the horizontal movement, two cannons, and is worth 3000 + 5000 points.
File:BO Boss W4.gifWorld 4 Boss (ワールド4ボス) - As its name implies, this is the boss of the game's fourth world. It has the horizontal movement, two cannons, and is worth 3000 + 5000 points.
File:BO Boss W5.gifWorld 5 Boss (ワールド5ボス) - As its name implies, this is the boss of the game's fifth world. It has horizontal movement, two boss cannons, and is worth 3000 + 5000 points.
File:BO Boss W6.gifWorld 6 Boss (ワールド6ボス) - As its name implies, this is the boss of the game's sixth world. It has horizontal movement, two boss cannons, and is worth 3000 + 5000 points.
