Boulder Dash. Episode IV: Rockford Returns. This is the fourth episode of the classical game redeveloped to enhance the playing experience. This remake features 32 caves from the original game and 3 difficulty levels. All in all, there are 96 dark caves waiting for you to dig through. Improved gameplay & usability, varying color palettes, 4 background music themes composed specifically for this release. Rediscover the long forgotten caves, trick and eliminate the flies by pushing boulders, watch them explode, stop the growing amoeba, and indulge your natural greed by collecting the shimmering diamonds. Try it all out. Go for quality and think retro. Download trial version and play the first 4 levels for free.