If you like the Portal games, and want a prequel of sort that that is a bit harder, I'd suggest:
Portal Stories: Mel - https://store.steampowered.com/app/317400/Portal_Stories_Mel/
Story, voice acting and puzzles are on par with the original Portal games. As mentioned, it's a prequel. Reveals more about Cave Johnson which you get to know to some degree in the original Portal games. Also some parts about how GlaDOS came to be. No spoilers.



EDIT: (Another suggestion.
https://store.steampowered.com/app/250620/Among_the_Sleep__Enhanced_Edition/
It's another game about athe dreaming. This time a toddlers dream world.
It has some puzzle elements in it. Like many other games in this sub-genre, it's more about the art, the story and puzzles.
Even though it's mentioned as a horror fps, it's not that much of a horror game. Just a toddlers view on the world which, from the perspective from a child can be kinda scary.
If you played through the horror-part of Superliminal, you know what this is about. Not that scary. Just a darker mood.

I only know 2 games using this idea: "Perspective" and "Fez". And both are great.

There was a similar game in the ludum dare 25 called "Tale of Scale".

It was only build in 48h and had some fun little moments.

http://ludumdare.com/compo/ludum-dare-25/?action=preview&uid=3663

https://www.youtube.com/watch?v=_sJPufr0qmI

The Witness
https://store.steampowered.com/app/210970

Manifold Garden
https://store.steampowered.com/app/473950

Maybe check out Quantum Conundrum. It's a first person puzzler with the Uncle of your character voiced by John de Lancie(Q from star trek) who talks to you throughout the game.

https://store.steampowered.com/app/200010/Quantum_Conundrum/

This one is a side scroller but it has a similar outside the box puzzle theme

https://store.steampowered.com/app/337490/Four_Sided_Fantasy/

https://store.steampowered.com/app/994140/Lightmatter/

A brilliant puzzle game using light and shadows. Released January of 2020.


https://steamcommunity.com/sharedfiles/filedetails/?id=172382322

These set of custom community maps for Portal 2 use non-euclidean geometry as the core mechanic for its puzzles.

Originally posted by Dryce:

Maybe check out Quantum Conundrum. It's a first person puzzler with the Uncle of your character voiced by John de Lancie(Q from star trek) who talks to you throughout the game.

https://store.steampowered.com/app/200010/Quantum_Conundrum/

came to post this one

https://store.steampowered.com/app/402040/The_Guest/

Originally posted by neetronica22:

The Witness
Manifold Garden

seconded
those two are the best

I would add also
https://store.steampowered.com/app/265690/

you could play the tech demo this is based on, Museum of Simulation Technology (but that is mostly just like the tutorial rooms since its just a tech demo)

Originally posted by ► magicschoolrp.com:

Searching for more FPS puzzle games about logic or perspective or thinking outside of the box

Portal 1-2
Stanley Parable
The Beginner's Guide
Antichamber
Perspective
The Talos Principle

(Please no walking simulator games like Dear Esther)

Superliminal

Originally posted by Dani B:

Originally posted by ► magicschoolrp.com:

Searching for more FPS puzzle games about logic or perspective or thinking outside of the box

Portal 1-2
Stanley Parable
The Beginner's Guide
Antichamber
Perspective
The Talos Principle

(Please no walking simulator games like Dear Esther)

Superliminal

I have a feeling people on the superliminal forums know about superliminal

https://store.steampowered.com/app/243220/FRACT_OSC/

is a no-brainer, if you dig rave esthetics.
It's a game about solving rhythm puzzles by operating modular synthesizers in a neon world.

Originally posted by frog:

Originally posted by Dani B:

Superliminal

I have a feeling people on the superliminal forums know about superliminal

same