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 world of Warcraft you can only kill a raid boss once a week. I found a way to force the boss to respawn after killing them.
Got a nice thank you message from the GMs when I explained the exploit