A Call From The Depths

What Is A Call From The Depths

A Call From The Depths is a horror-survival game that puts you in control of a submarine crew deep underwater. The premise is straightforward enough — you're managing resources, dealing with threats from the environment and external entities, and trying to survive longer than you probably will. It runs on Unity and targets PC, with community mods having kept it alive past its initial launch window. What makes it interesting, in a rough-around-the-edges way, is the audio design. The game relies heavily on sonar pings, creaking hull sounds, and distant vocalizations to communicate threat proximity. You learn to navigate by sound before you learn to navigate by sight, which is the right call given that visibility drops to almost nothing below a certain depth.

Getting Started With A Call From The Depths

Installation is simple if you pick up the official release. Download it from the standard storefront, install it, and launch. The game will walk you through a fairly barebones tutorial that covers the basics of movement, sonar operation, and the distress system. Skip the tutorial at your own risk because later mechanics build on it without restating anything. I ran into a specific issue early on that wasn't mentioned anywhere in the documentation or forums. If you're using a controller with analog stick input mapped to thruster control, the depth-hold behavior becomes unstable above 200 meters. The sub oscillates between target depth and an adjacent band roughly every four seconds. The workaround I found was to disable the analog smoothing option in the controls menu and switch to digital throttle input. It feels clunky at first but stabilizes the depth lock within about ten seconds of engaging. I spent an afternoon trying to mod the config file before realizing the setting existed in the UI, so don't make the same mistake.

Core Mechanics You Need to Know

Resource management is the main loop. You consume oxygen, power, and structural integrity simultaneously. Each threat event consumes one or more of these in parallel. Most players focus on threat response and neglect the passive drain that continues regardless of enemy presence. The passive drain on oxygen, for instance, scales with crew count. A three-person crew consumes roughly 40 percent more oxygen per minute than a solo run. That number matters more than you'd expect when you're three encounters away from running dry. The sonar system is your primary information tool. It has two modes: active ping and passive listening. Active pings reveal all nearby objects but also emit a signal that hostile entities can detect. Passive listening is quieter but only reveals movement in your vicinity. The tradeoff is real. Using active ping repeatedly in a long session creates a pattern that enemies learn to track. I found this out the hard way during a run where I used active ping every thirty seconds. By encounter four, the entity was positioned directly outside my viewport before the ping even completed. Switching to mostly passive listening with sporadic active pings changed the engagement dynamics completely. The distress system deserves a proper explanation. When you receive a distress call, you have the option to respond or ignore it. Responding gives you resources and occasional upgrades. Ignoring it costs you nothing but may trigger a penalty event later. The penalty isn't consistent, which is frustrating, but the resource gain from responding is usually worth the risk unless you're already critically low on hull integrity. I learned to check my structural status before committing to any distress call response.

Advanced Tactics and Things Beginners Miss

The most common mistake I see new players make is treating every threat as equally dangerous. They aren't. Some entities are purely informational — they reveal environmental hazards without posing a direct threat. Others are predatory and will actively damage your systems. Learning to differentiate them from the sonar signature alone saves a significant amount of resources over a full run. Predatory entities produce a lower frequency ping with a slight harmonic overtone. Informational threats sound cleaner, closer to a standard sonar return. This distinction isn't explained in the game. You pick it up through repetition or by watching other players' runs. Another thing the game doesn't make clear is that power distribution between systems is dynamic. When you reroute power from life support to thrusters, you're not just moving a number around. Life support reduction triggers a compounding effect on oxygen regeneration rate. A 20 percent power reduction to thrusters might seem minor, but it can drop your oxygen regen by nearly 35 percent because the systems share underlying efficiency calculations. I found this by accident while trying to speed up a retreat. The numbers didn't add up linearly, and working out the actual ratio took about an hour of testing. There's also a hidden stamina mechanic tied to manual sonar operation. Holding the sonar active for extended periods degrades your character's focus, which manifests as increasing audio distortion and visual noise in the cockpit. After about three minutes of continuous active sonar use, the distortion becomes severe enough to mask legitimate threat pings. The game doesn't tell you this exists. Taking breaks between ping cycles and rotating who operates the sonar in longer sessions keeps the distortion manageable.

Common Pitfalls and Where This Game Falls Short

The game has real issues that you should be aware of before investing significant time. The AI pathfinding for hostile entities is inconsistent. Some encounters feel fair and reactive. Others feel predetermined, with entities appearing at locations that don't align with any logical approach path. There's no reliable way to predict these, which makes strategy building difficult. You adapt to individual encounters rather than developing a general approach. The difficulty scaling is another problem. The game increases threat frequency and resource drain as you go deeper, but the scaling isn't smooth. There are sudden jumps where the game introduces a new threat type without giving you the tools to counter it effectively. These jumps tend to occur at round depth milestones, and they catch experienced players off guard as often as newcomers. If you're looking for a more polished experience in this space, there are alternatives that handle some of these systems better. Games like Subnautica offer deeper underwater exploration with more consistent design choices, though they take a different approach to threat management. Signalis handles resource tension differently but with greater attention to audiovisual feedback. If your main interest is the sonar and audio-driven threat detection, A Call From The Depths is still worth trying despite its flaws, but temper your expectations around polish and consistency.

Final Thoughts on A Call From The Depths

The game has a strong core idea that it doesn't always execute cleanly. The audio design is genuinely good, and the sonar-based gameplay loop is distinctive. The resource management layer adds enough tension to keep sessions engaging, and the hidden mechanics around power distribution and stamina create moments of discovery that reward experimentation. But the uneven AI, inconsistent difficulty spikes, and lack of clear communication about system interactions mean you'll encounter frustration alongside the good parts. Play it if you enjoy rough-edged survival games with strong atmospheric design. Just don't expect it to hold together perfectly under sustained scrutiny.