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Space Invaders Infinity Gene is a mobile version of the classic Space Invaders series that focuses on the concepts of evolution.  The graphics are vector-based, and largely match the look and feel of the original game.

The game opens with the following quote, hinting at the evolutionary themes of the game:

"It is not the strongest of the species that survives, nor the most intelligent that survives.  It is the one that is the most adaptable to change." - Charles Darwin

The game is dedicated to "everyone who loves games, and Charles Darwin."

Gameplay Mechanics

 Players control a ship on the screen by dragging their finger around the screen. The player must avoid fire from the alien ships while destroying them with their own weapons. The well-known UFO now drops power ups that allow the player to upgrade their current weapon, until they are destroyed. Some levels scroll from top-to-bottom, adding walls that the player must avoid to the obstacles. Many levels feature one or more boss ships, labeled as "unexpected enemies" or "huge enemies".  

A chain system rewards rapid destruction of enemy ships. Players earn an additional 0.1 multiplier for each chain achieved.

Immediately after an enemy fires, their shots are briefly transparent and can be passed through. Moving through a transparent shot earns the user 3000 points. This maneuver is called a "Nagoya Attack."

Each stage records the high score, best chain, and Nagoya Attack achieved. After a stage is completed, points are accumulated into a "Gene" gauge that, when filled, triggers an "Evolution", which gives the player new selectable weapons (such as homing lasers or wave beams), new abilities (most notably, the ability to move vertically), bonus stages, and extra content in the main menu. Evolutions that are earned in later stages can be used when replaying earlier stages. Most stages have multiple features to be unlocked by a second, third, or even fourth completion. These unlockables range from new weapons and secret stages to extra lives and art galleries, each one an extension of the player's evolutionary tree.
 

Other Features

In addition to the 38 primary levels, players can utilize "Music Mode" to generate a random level on the fly matching the length of the music. Due to limitations of the iPhone API preventing access to the raw music data, it is not clear whether the levels are truly synchronized with the music.

A sound test and graphics gallery mode are unlockable via gameplay.
 

Levels

 

Normal


0: Common Descent



1-1: Adaptive Radiation
1-2: Genetic Diversity
1-3: Subspecies
1-4: Silent Mutation
1-5: Founder Effect
1-6: Apoptosis

2-1: Frameshift Mutation
2-2: Radioisotope
2-3: Preadaptation
2-4: Homologous Recombination
2-5: Introgression
2-6: Necrosis

3-1: Gene Duplication 
3-2: Horizontal Gene Transfer  
3-3: Self-Organization 
3-4: Nonsense Mutation 
3-5: Struggle For Existence
3-6: Descent With Modification 
 

4-1: Suppressor Mutation
4-2: Conformation 
4-3: AT-Rich
4-4: Genotype
4-5: Loss of Function
4-6: Autolysis


 

5-1: Organizer
5-2: Codon
5-3: Canonical Genetic Code
5-4: Phenotype
5-5: Perikaryon
5-6: Cleavage


 

0: Back Mutation   
  

The normal mode has several different minibosses. Most of them make appearances at scripted moments in the normal mode, but many of them show up randomly in later levels.  The only exception is Nameless which appears in level 5-6 only. However, it can appear at the end of a level randomly in Challenge mode. The list of minibosses includes: 
 
The Moon 
Gigantic UFO  
Ultimate UFO 
Crab
The Sun

Mandala

Ladybug
Unknown      
Axon 
Water Strider 

Challenge

Challenge mode is made up of 99 levels which get progressively harder as the player advances through them. They are randomly generated and do not play the same way twice in a row. Minibosses will get progressively more difficult during this play mode.  

Bonus

The bonus mode levels are unlocked as evolution rewards.  There are two blocks of six levels each for a total of twelve levels.  The levels are:

Block 1:
1-1: Neutral Mutation

1-2: Discontinuous Replication
1-3: Antimorph
1-4: Leading Strand
1-5: Point Deletion
1-6: Allele
 

Block 2:


2-1: Tumor
2-2: Missense Mutation
2-3: Point Mutation
2-4: Replication Fork
2-5: Neomorph 
2-6: Order for Free 

Music

This mode is unlocked as an evolution reward. It allows a player to import music into the game which will play during a level. It also uses that music to create a visualization that renders underneath the vector graphics for the game. In order to use this mode an audiofile, such as an mp3, must be on the storage device or hard drive of the console. 

Weapons

  • Not all of the weapons are available initially. By default the only weapon available is Rapid. The rest have to be unlocked through evolutions.
  • Rapid  - rapidly fires beams.
  • Search  - fires curving lasers toward the enemy.
  • Wave - fires a shockwave that spreads horizontally.
  • Lock-On - locks on to enemies at the front and back and fires a homing laser.
  • Gravity - fires a black hole that increases in power as it sucks in enemy shots.
  • Round - fires an energy blast that destroys enemy shiots located opposite to your ship's direction of travel.
  • Field - Automatically attacks enemies within an expanded field. The power of the attacks will increase if the field's size is cut in half.
  • Option - Probes known as 'options' accompany your ship, eliminating enemy fire and attacking at yoru command.
  • Variable - Fires an angularly adjustable laser cutter.
  • Classic - fires a power beam that stops the time around enemies. (Cannot be powered up.)

 

Collection (Soundtrack)

The collection includes the game's soundtrack which was produced by Taito Corporation's in-house band, Zuntata (also known as Cosio). Some of the songs have multiple remixes. The sound effects are in a file labeled 'SE' 

Tracks

Selection 
Survival 
Mutation 
Reproduce 
Manipulate 
Strategy 
Program 
Lifegame 
Great Mother 
Child 
Shadow 
Anima 
Hero 
Devil 
Trickster 
Wise Old Man 
Persona 
Animus 
Scarecrow 
Unconcious 
 
These tracks are unlocked as BGMs which are given as evolution rewards during game play.

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