My disk is haven't got enough space!

In my laptop is have a 128gb hdd and there is just 23,5gb free space right now. I have just some app from app center and I need help how to delete something which is unused in the endless os system and get more space, I installed just one game which is like 10-15gb and usually I think i need to have 60-80gb free space. Don’t have torrents in my laptop and deleted every photo and music too.