Low-tech-ish games for a Steam/PC newbie, off the top of my head:
- Undertale
- The Banner Saga
- Hatoful Boyfriend
- Papers, Please
- Shovel Knight
- Monaco
- Cave Story
- Anything super-old. Fallout, Deus Ex, Planescape, Baldur's Gate, etc. (GOG is also a good place to shop for these, though I do love having my…