The Windows 3.1 SDK. I bought and read it at University, some decades ago, and I can still write simple C programs for Windows that compile under Windows 2000 and run under Windows 10.
I love Olvwm, way back at university we had Sun workstations. I have run it on Linux, but I don't think it can be readily compiled for 64 bit architectures on Linux. Maybe I'm wrong and someone may have achieved it, but I have never seen as a binary. Still on of my favorites though.
While I wouldn't be looking at a game, I would be looking for enthusiasm. Outright technical skill is important, but also how you dig into problems and push a project forward.
I also miss my early years, writing programs on a BBC Micros or for Windows 3.0 in Turbo Pascal for Windows. Now everything seems sanitized and no longer challenging.
I think it's the learning experience and result we crave.
I bought a cheap used ultra small form factor PC with an i5, 8GB of RAM, all for less than 200 USD. It even included a licensed copy of Windows 7 Pro, which I don't use.
The HK Government produces some excellent paper maps that have a water resistant coating.
I bought mine in the General Post Office in Central, near IFC. There's also the maps shop at the junction of Nathan Road and Gascoigne Road in Yau Ma Tei, Kowloon