If you’re older than 25, you likely played the heck out of Interplay games. I’m sure I put in a few hundred hours into both Fallout games. Stonekeep, Lionheart, JAGG and Freespace also took up a huge chunk of time. Some poor management decisions in the early 2000s meant the end of that company but it doesn’t mean you can’t still find the games.
GoG.com is having a 50% sale on most Interplay games. There are at least 5 games in that list that I’ll be getting. I have no idea when I’ll be playing them mind you, but having them in the back pocket for when my internet craps out (all day yesterday) is a solid investment.
For those that are a bit younger and might not have had the chance to play these games, at the very least you should try out Fallout 2. Every sandbox-RPG built in the last 10 years owes that game.