Direct quote
“100人規模で創るMGSがハリウッド娯楽映画だとすると、「ポリスノーツ」は自主映画に近い。あらゆる意味で僕の色がでている。” JA Original quote in Japanese; the summary below carries the meaning.
What it documents
Kojima wrote that on Policenauts he did almost everything himself — game design, a massive amount of dialogue, the adventure scripts written in simplified language, the storyboards, hit detection, flag management and even the image and sound calls — and that if Metal Gear Solid, made by a team of 100 people, is a Hollywood commercial film, Policenauts is closer to an independent film: in every sense his own colour shows.
Source
Konami, official website: message from Hideo Kojima on the Policenauts page (PSone Books) (page 2 of 2). View source ↗
“またゲームデザイン、膨大なダイヤログ、簡易言語を使ったADVスクリプト、絵コンテ、当たり付け、フラグ管理・・・絵や音呼びまで、殆どを自分でやった。”