I'm a huge fan of the excavation mechanic that is frequently used in games that feature archeology/paleontology. You know, the one where you have a piece of rock/soil and you have to use tools to delicately uncover the fossil hidden beneath without damaging it, or collapsing the wall, etc.
Some examples I can think of are
>It's one of the main mechanics in Fossil Hunters
>It's necessary to obtain fossil pokemon in Pokemon Diamond/Pearl
>It's a minor side-activity in Starbound
Now, I'm trying to find some more games that feature it, or preferably - are based all around it. Does /v/ know any? It's not exactly something that's easy to search for.