To unlock all 18 maps in The Mound: Omen of Cthulhu, you must find the 13 hidden logbooks scattered across the game's cursed landscapes. These critical progression items are always located inside a small tent within a fortified encampment. The key is knowing which maps contain these forts: on the contract selection screen, any map connected by a dotted white line is guaranteed to hold a logbook. Forget wandering aimlessly; your entire focus should be on identifying these specific maps and executing a clean, surgical strike to retrieve the book and extract.
This guide provides the definitive strategy for efficiently hunting down every logbook. It’s not a turn-by-turn walkthrough—the game's procedurally generated levels make that impossible. Instead, this is a repeatable blueprint for how to approach any logbook mission, minimize risk, and systematically unlock the entire game world, whether you're playing solo or in a co-op expedition.
What Are Logbooks and Why Do You Need Them?
Logbooks are the primary mechanism for game progression in The Mound. While contracts reward you with tokens and experience, only the logbooks expand your operational territory. There are 13 logbooks in total, and collecting them is tied to two separate achievements (for finding seven, and then all 13). More importantly, each logbook you successfully extract contributes to unlocking the game's full suite of 18 playable maps. Gaining access to new maps is essential, as it introduces new contracts, tougher challenges, and more lucrative rewards.
These logbooks are always found in the same type of location: a crude, wooden fort hidden somewhere on the map. Inside this fort, you will find a small, open tent containing the logbook on a table or crate. Your objective is to enter the map, locate this specific structure, retrieve the book, and make it back to your extraction boat. While other collectibles like guidebook pages and music tablets often appear in these forts as well, the logbook is the prize that pushes the game forward.
The Strategic Blueprint for Finding Any Fort
Because every map is a disorienting, monster-filled maze, your success hinges on strategy, not rote memorization. Follow this four-step process for every logbook hunt to maximize your chances of success and minimize the maddening frustration of getting lost.
Step 1: Select the Right Contract and Map
Your hunt begins at the mission table. The first rule is to keep it simple. Always choose a basic contract with the lowest difficulty and fewest complications. While some contracts might explicitly list 'Find the logbook' as an objective, these are often traps; they tend to be significantly harder and are not necessary for the logbook to spawn. The logbook is tied to the map, not the contract.
On the map selection screen, carefully examine the connections between locations. You are looking exclusively for maps linked by a dotted white line. This is the game's universal symbol indicating a logbook is present. Ignore maps with solid lines for now. Selecting a dotted-line map guarantees a fort will be somewhere within its bounds. If you have the tokens, consider purchasing the in-game map item for that level. It won't pinpoint the fort's location, but it's an invaluable tool for orienting yourself and preventing you from running in circles.
The Mound: Omen of Cthulhu in-game screenshot
Step 2: Prioritize Exploration Over Combat
Once your boots are on the ground, your mission is search and retrieval, not extermination. For your initial run on a new map, treat it as a pure reconnaissance mission. Your goal is to find the fort, and everything else is a distraction. Sprint past enemies when you can, conserve your resources, and ignore treasure chests unless they are directly on your path. The more time you spend fighting or looting, the higher the risk of taking damage, losing your sanity, or getting hopelessly turned around.
Typically, the forts are located deep within each map, often at the furthest point from your spawn location. This means you'll have to push through dense brush and navigate treacherous terrain. Focus on forward momentum. If you find yourself in a hectic situation and haven't located the fort, don't be afraid to quit the run. The game is forgiving and, as of the current version, will refund the tokens you spent on a map if you leave early. You can then restart the contract and use your newfound knowledge of the level's general layout to make a more efficient second attempt.
The Mound: Omen of Cthulhu in-game screenshot
Step 3: Use Environmental Cues to Navigate
The environments in The Mound can feel like random, chaotic tangles of mud and thorns, but there are subtle clues to guide you. The most reliable navigational aid is the network of cart tracks embedded in the mud. These faint paths, left by previous doomed expeditions, often lead toward significant points of interest, including the forts. When you're unsure where to go next, scan the ground for these tracks and follow them.
Another environmental helper is Baldi and his cart. If you see him, he can sometimes reveal a path forward you might have otherwise missed. However, the real challenge is often not finding the fort itself, but finding its entrance. These encampments are designed to be defensive and can have obscure, easily missed gateways. Circle the perimeter of any large wooden structure you find until you locate the opening. Be methodical; don't assume a wall is impassable until you've checked its entire length.
Step 4: Secure the Logbook and Extract
Once you've breached the fort, locate the small tent and grab the logbook. Now, your only priority is getting out. You have two options for extraction: carry the logbook yourself or place it in Baldi's cart. Unlike survivors, who must be placed in the cart, you can personally carry the logbook all the way back to the boat. This is often the faster and safer option, as waiting for the cart can leave you exposed.
Head directly back to the extraction boat. Don't worry if you haven't collected any treasure. As long as you return with the logbook, the mission is a success. Your handler, Curly, might give you a mild scolding for the poor haul, but he will ultimately praise you for securing the book. You will still receive the first tier of token and experience rewards, and most importantly, you'll be one step closer to unlocking all the maps. As soon as you reach the boat, you can initiate the extraction; you don't need to wait for the cart to arrive if you're carrying the book yourself.
The Mound: Omen of Cthulhu in-game screenshot
What if I'm still getting lost?
If you're consistently struggling to find the forts even with these strategies, the single best investment you can make is the consumable map item available for purchase with tokens before a mission. It provides a crucial overhead view that helps you build a mental model of the level's layout. Remember that you can quit a mission and retain the tokens spent on the map, so you can use it for a 'practice run' to scout the area, then quit and restart the same mission with that knowledge, ready for a serious attempt.
Another common mistake is misidentifying the target structure. Some maps contain large, fort-like buildings that are not the objective. The correct location is always a fortified encampment with wooden palisade walls, and the logbook is always inside a small, distinct tent within that encampment. If you find a large building but no tent, you're in the wrong place. Keep searching.
Your Path to the Full Game
Mastering this logbook-hunting loop is the key to unlocking the full depth of The Mound: Omen of Cthulhu. Each new map you reveal brings with it new horrors, but also new opportunities. By adopting a methodical, exploration-focused approach and learning to read the subtle environmental cues, you can transform these daunting expeditions from exercises in frustration into a series of triumphant victories against the encroaching darkness. Now, get out there and complete that collection.