This is the type of slot you can setup on auto-play and relax with. The main attraction for me is the smooth game-play and the chance to accumulate some reasonably big wins. There is a free spins round, which you can retrigger – and a random bonus award too. This is a lower intensity game with 5 reels and 3 rows of symbols. The brushed metal frame and detailed light-work on the gems which make up the symbols look very professional. Compared to many Octopus Gaming slots, Black Diamond is visually very crisp and clear.