Fatal Twelve - Demo
| Relation | Fatal Twelve |
| Title | Fatal Twelve - Demo |
| Type | Trial |
| Language | Japanese |
| Publication | Freeware, commercial |
| Platforms | Windows Linux Mac OS |
| Medium | Internet download |
| Resolution | 1280x720 |
| Voiced | Fully voiced |
| Released | 2017-04-09 |
| Developer | aiueo Kompany |
| Publisher | Sekai Project |
| Links | Official website |