TouchArcade Rating: A masterful blend of distinct gameplay styles is what makes Ocean Keeper shine. The game seamlessly integrates side-scrolling mining with top-down mech combat, creating a compelling and consistently engaging experience reminiscent of titles like Blaster Master and Dave the Diver.
In Ocean Keeper, you're stranded on an alien underwater planet in your powerful mech. The core loop involves venturing into underwater caves to mine resources before waves of enemies attack. Side-scrolling mining sections require excavating rocks to unearth resources and artifacts, earning you in-game currency. This mining phase is time-limited, forcing a strategic approach. Returning to your mech, the gameplay shifts to a top-down twin-stick shooter with light tower defense elements, where you repel waves of diverse and challenging underwater creatures.
Resources gathered are used to upgrade both your mining equipment and your mech, with extensive branching skill trees offering diverse customization options. The roguelike structure means death results in losing progress from that run; however, persistent upgrades ensure consistent advancement between playthroughs. Procedurally generated overworld and cave layouts add replayability.
While the initial stages of Ocean Keeper might feel somewhat slow, with challenging early runs, perseverance is rewarded. As upgrades accumulate and skills improve, the gameplay accelerates, transforming you into a formidable underwater force. The strategic depth emerges from the synergistic interplay between weapons and upgrades, encouraging experimentation with various builds and tactics. Despite a slow start, Ocean Keeper's addictive gameplay loop and satisfying progression make it incredibly hard to put down once the momentum builds.