Switchblade

Switchblade is a computer platform game developed by Core Design and released by Gremlin Graphics in 1989.
The game was released for the Amiga, Atari ST, ZX Spectrum, Commodore 64 and Amstrad CPC formats. An enhanced port of the latter for the Amstrad GX4000 console was released in 1991.
The player guides the protagonist, Hiro, through a flip-screen platform environment with a subterranean setting. Unexplored areas of the screen are obscured from view until the player character enters them.
A sequel, Switchblade II was released in 1991.