risk of rain is a rouge-like game where you select characters and fight hordes of enemies to get to the final boss.
difference? the game becomes more difficult as time goes on, so you can stay in one level and farm money and exp
to give you an idea on how shit can get worse:(excuse my rude language)
when you start off, things are ok, enemies are in small numbers and easily manageable
15 minute mark: enemies increase in strength and numbers greatly, enemies now heal other enemies and have different passive effects.
1 hour mark: bosses start to spawn randomly (enough said)