Giga Wing

Giga Wing is a vertical Shoot Em Up series developed by Takumi and published by Capcom for arcades.

It is perhaps best well-known for two features:
 * The Reflect Barrier shield, which takes whatever masses of bullets touch it and reflect them back, often inflicting massive damage upon enemies.
 * The scoring system. Due to some scoring mechanics in which collecting one of many, many medals increases the value of the next one, and your medal count acting as a score multiplier, it is easily possible to have a score well beyond the scale of most other games' scoring systems.

The series spans three games:
 * Giga Wing (Arcade/Dreamcast, 1999)
 * Giga Wing 2 (Arcade/Dreamcast, 2000)
 * Uses 3D graphics instead of 2D, and adds a new kind of reflect attack, the Reflect Laser. Also introduces the "volcano" mechanic: if enough medals are on the screen, a "volcano" of medals will erupt, producing even more medals. The Dreamcast port adds a 4-player option, a rarity for a shoot-em-up.
 * Giga Wing Generations (Arcade/PS2, 2004)

Not to be confused with Zero Wing.

The Giga Wing series contains examples of:

 * One Up: There is one available in item form near the end of the fourth stage. However, it won't appear unless you've died at least twice by that point (which on default settings means you're on your last life).
 * Bittersweet Ending - Giga Wing: Your character In order to avert this ending, you must beat the first six stages on one credit to see the true final stage (and boss).
 * Bullet Hell - But by employing the Reflect Barrier properly, you can turn it into Bullet Heaven.
 * Cap - The maximum multiplier in the first game is 49,999,999 which can be reached near the end of the game by very skilled players. In the second game, the maximum multiplier is 999,999,999; this can be reached in the third stage out of 7 with skill. Amazingly, the score caps in any game are nigh unreachable.
 * In the second game, there is a cap of 110 medals on screen as well as an unknown total object cap; reaching either will cause an item volcanon, where the background will go black and then each medal will split into 10 or more kite-shaped medals.
 * Color Coded for Your Convenience - In the first two games, the lowest 8 digits of your score are colored blue, the next four yellow digits (the oku places) are yellow, the four digits in the chou supergroup is colored red, and (in the second game, where such scores are possible) the digit(s) afterward (kei) are cyan . Generations uses a different color scheme (red for kei, yellow for chou, green for oku, gray for anything smaller).
 * Crosshair Aware - Confound that gunboat boss's second-phase pattern!
 * Cultural Translation - The kanji used as separators for every fourth digit in the player's score were removed in the US releases of the games. The US releases don't even bother to replace the kanji with commas, so reading scores in the US versions is a bit trickier.
 * The US version of Giga Wing 2 uses commas when displaying the player's score at the end of a stage, though still has the myriad-based (supergroups of four digits as is common in east Asia; see below) color-coded digit groupings otherwise.
 * Defeat Means Playable - Defeating  unlocks it as a ship in the Dreamcast version of the first game.
 * Difficult but Awesome - Stuck/Widerstand. His bomb weapon is tricky, but if you get good enough at using him, he's not only powerful but also the best scorer.
 * Dynamic Difficulty - The game uses a very simple version of this, with the difficulty increasing until the first time you die (if at all). Also applies to the pity One Up (see below).
 * Excuse Plot - Averted in Giga Wing Generations, which has no plot at all.
 * Fan Nickname - Giga Wang.
 * Gratuitous English - Giga Wing 2: "RIFUREKUTO FO-SU!"
 * And when the reflector charges up again, the voice is supposed to say "Okay", but it sounds like "Otay".
 * Homing Projectile - Isha from the first game has a straight shot paired with guided missiles. Chery from the second game has a similar weapon.
 * Lightning Bruiser - The secret ship from the first game. Very fast, and it has a ridiculously powerful weapon and bomb.
 * Nintendo Hard
 * No Export for You: Giga Wing 2 had no arcade release in the US, but the Dreamcast version was localized. Completely played straight with Giga Wing Generations.
 * Pinball Scoring - Quite possibly the king of this trope.
 * Return to Shooter - The Reflect mechanic.
 * Scoring Points - One of the main highlights of the game, in a subversion of score being regarded as a pointless number. How often do you see scores of at least 1 trillion?
 * Secret Character - See Defeat Means Playable above. The second game has the five (four standard + one secret) ships from the first game as secret ships.
 * Self Imposed Challenge - Some players try to go for the lowest score possible, or go as far as possible without scoring at all.
 * Sequel Escalation - Each game ups the ante with more medals to collect and thus more points to be had. Giga Wings 15 digits? Nothing compared to Giga Wing 2s 17 digits...which in turn is surpassed by Giga Wing Generations, quite possibly the only commercial game where you can achieve 20-digit scores.
 * True Final Boss - Two of them, in Giga Wing: