Magical Zoo's The Screamer was a 1985 post-apocalyptic sci-fi action RPG released in Japan for the NEC PC-8801, PC-9801 and Sharp X1 computers.
It was set after World War III and revolved around cyberpunk and biological horror themes.
It featured gameplay that switched between first-person dungeon crawl exploration and side-scrolling shooter combat, where the player could jump, duck and shoot at enemies in real-time.
In January 2015, the Romhacking user Helly released an English fan translation of The Screamer. The translation patch is available here.