Games Sleeping in My Library for Some Reason..

All you Steam users probably have this, right? Games that have been sleeping in my library for years... I still have PS discs I bought but never played... I saw streamer Sonyshow on Chijijik playing and thought it looked fun, so I bought all 3 parts during a package sale and even applied the Korean patches... But I'm putting them off, thinking I have to play them through once I start, so I'll do it when I have time... Danganronpa 1, 2, 3 that I've been neglecting until now... I kind of know the general plot and who the bad guy is for Part 1, so I'm a bit reluctant to play it... And since I'm not playing Part 1, I can't play Parts 2 and 3. Does anyone else have games they bought on sale and are just keeping on their Steam, PS, or Switch library without playing them..?