This 1983 release from Doric Computer Services for the ZX Spectrum is a simple, but engrossing, cave exploration game with tense combat and tough gameplay.
The Oracle’s Cave is partially written in BASIC, but don’t let that put you off, because although this is a very early game in the life of the ZX Spectrum, it is still one worth revisiting now. I played it again recently and almost completed it! Great fun for retro game freaks. Like me.