In Portal Detective, you start in a randomly generated series of rooms to explore. However, not all is as it seems...

Some doorways between rooms are normal, and some of them are portals, which are also randomly placed. Your job is to identify which doorways contain portals - to try and understand a space that resists understanding.

The portals, unlike in say, the hit game Portal, are not obvious. On first glance, they will look like any other doorway. Only through careful observation, and an understanding of the space, will you be able to successfully identify the portals.

Once you've successfully identified a portal, the rooms are regenerated, but with more rooms added each level, the challenge increases.

Sometimes the portals will appear on opposite sides of the same room, creating a small, perfect loop. Other times, they might not be so easy to spot, like when the entire level is the loop.

How To Play:

WASD To move

Shift to Sprint

Space to jump (you won't need it, but it's in there)

Mouse to look

Face a doorway that you think is a portal, stand in front of it (about a metre away) and Right Click to identify it. If it is a portal, you will be taken to the next level. If it isn't, then don't worry, you still have 1 attempt left. If you waste that attempt though, you will go down 2 levels.

The number in the top-left is your current level, in the top right, the remaining number of attempts.

Special thanks:

• @toficofi for making me nicer rooms and plinths, and being a good friend
• Sebastian Lague for making amazing portal code and putting it online for free. This project wouldn't have been possible without it.
• @sassqueenamy for moral support

Audio:

Tranquility by Kevin MacLeod
Link: https://incompetech.filmmusic.io/song/4543-tranquility
License: http://creativecommons.org/licenses/by/4.0/

Sound Effects from "Aturax's Cinematic Impacts" by Aturax Audio

You can try the Windows build on Mac and Linux (Unity says it should work) but it's untested.