The game 'Spelunker'.
Spelunker HD happened in 2009.
Spelunker HD was created on 2009-03-26.
A synonym for this would be spelunker. A spelunker is one who explores caves.
Although he had explored caves in his teens, he did not consider himself a skilled spelunker.
He or she explores caves.
Spelunker - 1984 VG was released on: USA: 1983 Japan: February 1986 (arcade version)
A 'spelunker'
Speleologist
A person who explores caves is called a spelunker or a caver.
A spelunker-enthusiast +++ "Caver" - see Discussion note.
The name for someone who studies caves is a speleologist or a spelunker.
Floyd Collins