Illvelo Swamp

Illvelo Swamp

Nintendo Switch game logo

Developer:	RS34
Music:	Daisuke Nagata
Program:	Manabu Matsumoto, Takahiro Kawachi, Hayato Okabe
Art:	Daisuke Nagata
Release date:	November 1, 2021

Illvelo Swamp is a vertically scrolling shoot-em-up developed and published by RS34 for Nintendo Switch in 2021. Like Radirgy Swag, it plays in horizontal orientation, with a slightly angled perspective.

The game's title and general aesthetics draw from the original Illvelo, though this game introduces new mechanics and has a radically different stage structure. There are 100 stages in total (as a reference to the 100 bonus stages in the original Illvelo)

Gameplay Overview

Illvelo Swamp is a twin-stick, four-button game with one playable ship. The left analog stick is used to control the ship (with uniform speed) in any direction, or with the directional pad in a total of eight directions. The right analog stick can be used to control the detachable Doll (modules) independently from the ship.

Controls

Buttons are configurable in the options menu.

• Shot: Shoots a forward-facing shot
• Doll: Various Doll-related features
  • If Doll are docked to the ship : Launches Doll/Activates Megalodoll
  • If Doll are detached : (Hold) Moves the Doll in the same direction the ship is moving/(Double tap) Returns Doll to the ship
  • If Megalodoll is activated : (Double tap) Deactivates Megalodoll and returns Doll to the ship
• Megalophaz: Generates a circular field around the ship that grants temporary invincibility, absorbs all bullets that touch it, and collects items. Equivalent to a bomb in other games.
• A. Shot: A toggle to turn continuous shot on or off. With this toggle enabled, the ship (and Doll) will continuously shoot as if the shot button is pressed down. This can reduce finger strain for the player.

Also, a shield appears in front of the ship and Doll if the shot button is not pressed for a short time. The shield remains in front of the ship and Doll and absorbs bullets until either the shot button is pressed again.

Items

An item spawns when a leader is defeated, or all enemies in a formation of flying enemies are killed, or a middle-sized enemy is destroyed. Items are attracted towards the ship if it is close to them. Item names below are based on ones shown in the logs of the DEV mode in Illvelo Swamp Happy Together.

	Score item/Hi-Score item/Sp-Score item: Worth 1000/10000/100000 points respectively. Point values are tripled in blue stages.
	Unfortunate item: Nothing happens when collected.
	Level up half item: Unlike what their name and the appearance suggests, it gives a quarter of the EXP gauge of the attribute with the lowest level.
	Level up item: Unlike what the name and the appearance suggests, it fills up a half of the EXP gauge of the attribute with the lowest level.
	Level up double item: Unlike what the name and the appearance suggests, it gives you 1 level for the attribute with the lowest level and keeps the EXP gauge.
	Mail item: Generates a random email at the bottom of the screen.
	Shot erase item: Erases all enemy bullets on the screen.
	Shield deploy item: The ship deploys a shield even if it is currently shooting. This effect lasts for 10 seconds.
	Invincible item: Gives the ship temporal invincibility for 10 seconds.
	Megalomajill item: Instantly fully recharges megalomajill gauge, enabling Megalodoll or Megalophaz.
	Extend item: Increases your life count by 1 (up to 5 lives).
	Random item: Gives you the effect of randomly chosen one of the 19 items described above.
	Key(bronze/silver/gold): Spawns at the top of the screen when a key order is cleared. Required for unlocking the stage branches. Comes in three valiants: the standard bronze one, the silver one worth 5 keys, and the gold one worth 10 keys. Even if you fail to touch and collect a spawned key, it is considered collected when it disappears to the bottom of the screen.

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Development History

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Gallery

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References & Contributors

• Information on gameplay mechanics gained by mojilove through playing the game.