The PC Engine is 30 years old, wow, heres the latest releases, thanks to PDRoms:

Nantettatte Engine (PCE Game) (PC Engine)

Saber Rider and the Star Sheriffs (Commercial) (WIP) (DC & PCE Game) (Dreamcast)

Atlantean (Commercial) (PCE Game) (PC Engine)

DATASTORM 2017 Invitation (PCE Invitro) (PC Engine)