I have Portal, and Portal 2 in my Steam games library… I spent hours playing “Portal” when I got it… I had to give in with Portal 2, it was just too hard to play…
Anyway - I haven’t run it on my current system - but - I did play it on my circa 2010 AMD Phenom II system - with 16 GB DDR3 and a 2 GB NVidia GTX650-ti-OC GPU… It ran well… Natively on Linux… Probably Ubuntu 14? 18?
So long ago… Just looked - according to Steam I last played it in December 2015! 10 years ago! So it would have been Ubuntu 14 or even 15 I ran it on…
The system requirements look pretty conservative - 512 MB RAM and no specific graphics card model… I’m sure it used to list Windows and Linux requirements separately - now it only shows Windows requirements… It still has a Steam logo next to the Windows one - so you can still get the Linux native version…
So - anyway - it sounds like it should run on a Netbook - maybe with the lowest possible settings…
Note: Atom is technically 64 bit - but in my experience, you’re better off running a 32 distro on them…
Note also : even “today” a whole bunch of Steam binaries and libraries on Linux are 32 bit - you can see it install a pile of i386 stuff … And given that Portal is a Windows XP era game - it’s probably 100% 32 bit…
There is also a proviso at the bottom under the system requirements :
" ***** Starting January 1st, 2024, the Steam Client will only support Windows 10 and later versions."
I’m not sure what that means actually… I assume if you’re running Windows X, Vista, 7 or 8 - you’re fresh outta luck… It’s a shame they no longer mention recommended spex for Linux.
I’m intrigued to play it again now - as there’s an RTX version (raytracing) - when I first got my current GPU (Radeon X6600) around 2022, the open source drivers didn’t support raytracing - they do now!
Here’s one suggestion - can you try setting it in your Steam Games library to use Proton which will install the Windows version through Proton/Steamplay emulation layer (it uses Wine). I’ve had to do that in the past with a Linux native game - that ran really crappily natively - but the Windows version seemed better (an RTS game called “Cossack 3”).
e.g. I could instruct Steam to install and run the Windows version of Borderlands 2 instead of the Linux native (check the box “Force the use of a specific Steam Play compatibility tool”:
But that would be silly - there’s nothing wrong with the Linux native version…
Anyway - a google seach says it should run on a Netbook…