
Dive into the Ocean Keeper – a cooperative roguelike where four survival miners defend their Mech Spider, fight with endless hordes of monsters, and dig for resources. Team up with your friends, upgrade between waves, and survive the deep caves, full of treasures… if you can.
Modeled estimate, not a reported figure. How we estimate →
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About
Fight endless waves of monsters, protect your Mech Spider, and mine resources in Ocean Keeper, a survival co-op roguelike. Play as one of four miners, upgrade your gear and Mech, and explore underwater dungeons. Face the ocean’s dangers and do whatever it takes to stay alive.

Team up with your friends and climb into the Mech Spider to kill thousands of monsters. Work as a team to protect your Mech – if it goes down, your crew will be defenseless against hordes of creatures.

Take a rest from endless battles and explore the caves in search of valuable resources and rare artifacts. But don’t get too comfortable – your team has just one minute to mine, upgrade your gear, and get ready for the next wave. If you are brave enough, you might find something truly powerful… just in time to face the bosses.

Mine resources from the ocean depths to unlock and upgrade powerful gear. Choose from 9 unique weapons – each with its own range, strengths, and playstyle. Don’t forget to coordinate with your team and plan your loadout beforehand: strategic positioning is key to protecting your Mech and surviving the endless waves.

In Ocean Keeper, no two waves are ever the same. Each brings new challenges, enemies, and opportunities for your team to adapt, strategize, and survive various underwater adventures. Upgrade your gear differently every time, uncover rare relics, and battle frightening bosses – you will never experience any run twice.
So gear up, dive deep, and may your Mech legs never rust.
Good luck, survival miners – the ocean is waiting.
Stats
All-time low is the lowest price we've recorded for this game since we started tracking it.
Languages: English, French, Italian, German, Spanish - Spain, Hungarian, Japanese, Korean, Polish, Portuguese - Brazil, Russian, Simplified Chinese +4 more
Engagement
Hours played at review time, across 40 reviews with recorded playtime.
Reviews
Themes across 40 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
positive critical· bar length = how often the theme comes up
Reviews
It’s enjoyable if you like the genre
It scratches that specific itch in my brain. The loop of mining -> upgrading -> defending is super satisfying. Great game to zone out to while listening to a podcast
Played solo: tough but manageable Played with friends: comedy
Bought it on sale, no regrets
Can't really recommend... there are many UI bugs, no tutorial and it feels like a flash game from the 2000s. Not sure of what is going on at all.
Not perfect, but fun
하지마세요..
Ocean Keeper Co-op Drill Multiplayer is a cooperative roguelike survival game developed and published by RetroStyle Games that successfully transforms the original Ocean Keeper formula into a team-focused experience. Designed for up to four players, it combines resource gathering, frantic combat, and strategic progression within an underwater world filled with hostile alien creatures. Rather than relying solely on fast reflexes, the game encourages constant cooperation as players work together to collect minerals, strengthen their equipment, and defend their mechanical base against increasingly dangerous enemy assaults. This emphasis on teamwork gives the game a distinctive identity, making every expedition feel like a shared mission where communication is just as valuable as firepower. The game's structure revolves around alternating periods of exploration and defense. Players use precious downtime between enemy waves to descend into sprawling underwater caverns in search of minerals, relics, and hidden treasures. Every second spent mining carries an element of risk because the next attack is always approaching. Teams must decide whether to push deeper for greater rewards or retreat with what they have already collected before the battlefield erupts once again. This constant balancing act creates satisfying tension throughout each run, ensuring that exploration never feels relaxed or repetitive. Every successful mining trip directly contributes to the team's chances of surviving the increasingly difficult battles ahead. Combat delivers an exciting blend of arcade action and tactical decision-making. Instead of simply defeating monsters, players are tasked with protecting their towering Mech Spider, which serves as the centerpiece of every defensive encounter. Alien swarms attack from multiple directions, forcing teammates to divide responsibilities and support one another rather than acting independently. As enemy numbers continue to grow, maintaining strong positioning and using each player's chosen equipment effectively becomes essential. The escalating difficulty keeps the action engaging while rewarding groups that communicate well and adapt their strategies instead of relying on brute force alone. Character and equipment progression provide another compelling reason to continue playing. The minerals recovered during expeditions can be invested in powerful upgrades that improve weapons, strengthen defenses, and unlock new combat options. With nine unique weapons available, players can experiment with different builds that complement one another instead of duplicating roles. Some weapons excel at crowd control while others focus on eliminating powerful elite enemies, allowing teams to develop specialized strategies that suit their preferred playstyle. The upgrade system offers meaningful progression without becoming overly complicated, giving each successful run a rewarding sense of advancement. One of the game's strongest features is its procedural design, which keeps every expedition unpredictable. Cave layouts, resource locations, enemy encounters, relic discoveries, and boss fights are randomized, preventing players from memorizing optimal routes or relying on identical strategies. Unexpected discoveries can dramatically alter a run, encouraging adaptability and experimentation throughout every session. The inclusion of hidden artifacts and powerful upgrades further enhances replayability by ensuring that no two adventures unfold exactly the same way, even after many hours of gameplay. The underwater setting is visually appealing, blending vibrant pixel art with atmospheric lighting that captures both the beauty and danger of the ocean depths. Mining through mysterious caverns before emerging into large-scale defensive battles creates a satisfying contrast in pacing. Enemy designs are varied enough to keep encounters visually interesting, while the mechanical appearance of the Mech Spider gives the game a memorable focal point. Although the presentation favors stylized visuals over technical realism, the artistic direction complements the gameplay perfectly and helps establish a distinctive science-fiction atmosphere. Ocean Keeper Co-op Drill Multiplayer succeeds because it combines several familiar mechanics into a cohesive cooperative experience that rewards planning, communication, and teamwork. The fast-paced cycle of exploration, resource management, upgrading, and survival creates an addictive gameplay loop that remains enjoyable across repeated sessions. While solo play may not fully capture the game's intended design, groups of friends looking for an engaging cooperative roguelike will find plenty of reasons to keep returning. This title delivers an entertaining mix of strategic mining, intense action, and satisfying progression that stands out within the multiplayer survival genre. Rating: 7/10
Нет ну это просто очень плохо =\\\ даже не знаю как такое сделать то можно было?
Don't have 4 players, don't bother. Nothing like the single-player game.
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Trends
Concurrent players on Steam, sampled daily since tracking started.
Audience
Estimated from the language of this game's reviews — a proxy for where players are, not official Steam demographics.
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