8234 is the name of a main belt asteroid discovered in 1997.
https://en.wikipedia.org/wiki/8234_Nobeoka
57 is the atomic number of Lanthanum, the first element in the lanthanide series, also known the rare-earth metals.
https://en.wikipedia.org/wiki/Element_57
Rare earth metals are often found in asteroids and are a chief reason to mine them, thus the game might be related to asteroid mining.
I'd also like to note that the hint is not marked as hint number 1, so it could be the first and only hint, OR there are hints before it!