If you are looking for specific "paper" games that run on older hardware, these are popular options: Paper.io 2
A treasure trove of unique indie games, many of which are free or pay-what-you-want. FreeGameFindings low end pc games download link
: The largest library available. You can filter for "Low Spec" or check the "System Requirements" at the bottom of every game page. If you are looking for specific "paper" games