Prototype Ltd. (株式会社プロトタイプ, Kabushiki kaisha Purototaipu) is a Japanese video game publisher established on March 27, 2006 by Toshio Tabeta, a former producer of Interchannel.

While still with Interchannel, Tabeta's team was responsible for mainly developing and publishing versions of visual novels originally published by VisualArt's for consumer platforms like the PlayStation 2 and PlayStation Portable.

After Prototype split off from Interchannel, the company still continued to work with VisualArt's.

Prototype has also produced a set of drama CDs based on Key's visual novel Clannad.

This Japanese video game corporation or company article is a stub.