Especially with video games you can cause, say, opening chests to always have a small positive reward (1 rupee, etc) and sometimes contain giant rewards (1000 r

Especially with video games you can cause, say, opening chests to always have a small positive reward (1 rupee, etc) and sometimes contain giant rewards (1000 rupee + AwesomeSword), making it always a dopamine hit even with low-risk activities like opening a chest.