Tenebra 2 is a homebrew puzzle game by Haplo for multiple computer systems and game consoles such as the NES, ZX Spectrum, and Atari Jaguar. The game works just like the previous entry — a protagonist that's very afraid of the dark needs to escape from a dark dungeon — but with a couple of additions, the biggest one being a portal gun that works just like the one from Portal. There's also sliding doors that are activated by pressure plates, a pickaxe to break down broken walls, and arches that collapse and block your path once walked through.

Cephla here plays the NES version and once again helps the protagonist escape the darkest dungeons as fast as possible, skipping a few levels thanks to an oversight in the portal mechanics.

You can get the NES version here.