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
In RDR2 there is a mine in the New Austin area. Any NPC that you kill inside the actual mine shaft will have a gold nugget on them. I baited as many as I could to go in and looted a ton of nuggets.
And they respawn, so you can go back and do it over and over. Bet this is somewhat commonly known though cause it was so obvious the first time I went through there. Guys who were laying right outside the entrance had no gold nuggets and vice versa.