Facts
- Founded
- March 27, 2006
- Country
- Japan
- Games published
- 7
- Headquarters
- Chūō
- Website
- prot.co.jp
Sources: Wikidata (CC0) · Wikidata Q847101
Games published · 7
| Game | Released | Developer | Series |
|---|---|---|---|
| Clannad | April 28, 2004 | Key, Visual Arts | Clannad |
| Lucky Dog 1 | June 10, 2009 | Tennenouji | — |
| The Labyrinth of Grisaia | February 24, 2012 | Front Wing | — |
| Rewrite Harvest festa! | July 27, 2012 | Key | — |
| Amatsutsumi | July 29, 2016 | Purple software | Amatsukago no Tori BOX |
| Taisho x Alice: Heads & Tails | April 21, 2017 | Primula | Taisho x Alice |
| Taisho x Alice: All in One | April 18, 2019 | Primula | Taisho x Alice |