Sachen (聖謙企業股份有限公司), also known as Thin Chen Enterprise, Commin (on handheld games only) was a Taiwanese developer and publisher of unlicensed games for the NES/Famicom, Game Boy and Mega Drive/Genesis, and licensed games for the Mega Duck and Supervision handhelds.

Sachen started activities in late 1988. In 1989 they released their first game, Jovial Race which was developped by a branch named Joy Van. At the end of 1989, Sachen and Joy Van merged and all subsequent games were credited to Thin Chen Enterprises or Sachen. Around 1992-3, the company started to focus on other consoles than the Famicom such as the Mega Duck and the Game Boy. Sachen stopped actively developing games around 1995-6, but a group of ex-Sachen staff continued to develop games for other publishers after this point. From 1999-2002 Sachen released four new Game Boy Color games (three of which were NES ports) which would be their final new releases. Sachen ceased activities in early 2007.

While most of Sachen's early games were original, albeit sometimes derivative, some of their later releases were unauthorised ports (such as Super Pang, Super Pang II, Gaiapolis and Mei Shao Nu Meng Gong Chang) or used assets of existing games (Samurai Spirits, Mahjong Academy, Rocman X).