Secrets of Atlantis invites players on an underwater expedition to the fabled sunken city of Atlantis. The game features an engaging atmosphere with shimmering graphics and aquatic symbols. Nudge Wilds can appear and cover entire reels, while the Highlight feature can trigger a Colossal Symbols Re-Spin, where a massive 3x4 block of symbols spins across the central reels, creating exciting win opportunities in the deep blue sea.