I know the number is shrinking by the day, however, I know many games, even ones people deem great, still haven't seen digital releases. I want to collect games in general, but as for PC specifically, I'd rather start with games that I can't get digitally, more sensible to me.

So basically, are there any worthwhile games you're aware of without digital versions, or a solid resource that I can use to find them on my own? Haven't had any luck personally with the latter so far.