TouchArcade Rating: A winning formula: seamlessly blending distinct gameplay styles into a cohesive whole. Think Blaster Master's blend of side-scrolling and top-down action, or the recent hit Dave the Diver's fusion of roguelike diving and restaurant management. Ocean Keeper from RetroStyle Games achieves a similar feat, creating a compelling gameplay loop and upgrade system that keeps you coming back for more.

In Ocean Keeper, you're stranded on an alien underwater planet in your trusty mech. The core gameplay revolves around two distinct phases: underwater mining and mech combat. Side-scrolling mining sections require you to excavate resources and artifacts from underwater caves, earning you coins in the process. However, time is limited; waves of enemies are approaching, forcing you back to your mech for defense. This shifts the action to a top-down twin-stick shooter with light tower defense elements, where you'll battle waves of bizarre aquatic creatures.

Resources gathered during mining fuel upgrades for both your mining equipment and your mech, with extensive branching skill trees for both. The roguelike nature means death ends your run, resetting upgrades and abilities. However, persistent upgrades and customizations unlockable between runs ensure continuous progress, even after setbacks. Expect varied overworld and cave layouts with each playthrough.

Ocean Keeper starts slowly, with initial runs likely feeling challenging. Persevere! As you progress, upgrades become more frequent, skills improve, and gameplay becomes more fluid. You'll soon become a force of underwater destruction. The synergy between weapons and upgrades is key, offering endless experimentation with different builds and strategies. While the initial slow pace might be off-putting, once Ocean Keeper finds its rhythm, it's hard to put down.