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"GENETOS" is an freeware vertical shooter game or "shoot 'em up" developed and published by Tatsuya Koyama with an "evolution" theme. In GENETOS, the levels represent different generations in the evolution of shooting games. The video game was developed entirely by Tatsuya Koyama who provided the graphics, programming and music, creating GENETOS entirely himself. GENETOS is free to download from Tatsuya Koyama's personal website, downloadable in either Japanese or English from the corresponding page.〔(【引用サイトリンク】url=http://www.tatsuya-koyama.com/software/wg002_genetos_eng.html )〕〔(【引用サイトリンク】url=http://genetos.en.softonic.com/ )〕 ==Gameplay== The gameplay of GENETOS is focused around the evolution of "shmups" or shoot 'em ups throughout history. The game starts off with simple graphics reminiscent of Space Invaders being a "Gallery Shooter" or "Fixed Shooter" having limited graphics, music, movement and sound effects.〔(【引用サイトリンク】url=http://www.tatsuya-koyama.com/software/wg002_genetos_eng.html )〕 Each level or generation gradually goes further in the history of shoot 'em up games moving into a late eighties world with free-movement restricted to half the screen, a "more standard" level improving the layout and graphics of the game and giving the player more firepower and giving the player bombs which can be used with the X button on the keyboard. The 4th level in the game features simple 3D graphics and shifts to a "Bullet Hell" game featuring much higher amounts of bullets and larger amounts of enemies.〔(【引用サイトリンク】url=http://www.tatsuya-koyama.com/software/wg002_genetos_eng.html )〕 The 5th level of GENETOS or the "Final Generation" changes largely in tone following a story more so than the levels before. the player travels through various stages of evolution such as birth, variation and extinction loosely following the theory of natural selection and Darwin's theory of evolution.〔The "final generation" is split up into different stages titled: birth, variation, selection, prosperity and extinction; similar to the stages of natural selection and the theory of evolution〕 Each level ends with a boss or a "mutant", triggered by gathering enough items allowing the item bar to be 4/5 full or collecting 800 of a 1000 total items. Filling the item bar will allow the player to "evolve" into the next generation of shooting games, improving graphics, firepower and special attacks of the players ship. Scoring in GENETOS is mainly done by picking up point items which are blue rather than regular items being green, in the 3rd level the player can stop shooting to allow powerups and items around to drift towards the ship and further in the game this becomes faster allowing the player to collect items easier. Collecting green DNA powerups in GENETOS allows the player to gain the special attacks and bonuses, these are found in various places in the games by defeating enemies. The way the player plays through GENETOS affects the special weapons they get, playing in certain ways, dying or staying alive, staying in certain areas of the screen or defeating a boss with a weak ship can unlock these bonus weapons, helping the player throughout the game. The difficulty of GENETOS varies depending on the era of game it is portraying itself upon, getting more difficult with each generation ending as a "bullet hell" type of game.〔(【引用サイトリンク】url=http://www.indiegames.com/blog/2009/12/freeware_game_pick_genetos_tat.html )〕〔(【引用サイトリンク】url=http://playthisthing.com/genetos )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Genetos」の詳細全文を読む スポンサード リンク
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