When I was playing dying light with friend we discovered that every timw you go to sleep and wake up air drop will appear, if you don’t know air drops are pretty rare and if you collext them and deliver to one guy you will recieve lots of xp, we used that multiple times to unlock grapling hook very early. Air drops also gave lots of medicine which was hard to get in early game and that very helped us
I did not discover it but its the exploit I abused way too much. Collectors map from GitHub for RDR2 back when you knew the location of every trinket every rotation. I spent 2-3h every day for a week if not more collecting every single flower,tarot card etc… in the end I purchased pretty much everything there was to buy in game and still have some money to spare