Into The Depths Walkthrough: A Guide to Surviving the Depths

Getting Started: Your First Descent

Into The Depths plunges you into a procedurally generated underground world where survival hinges on smart resource management and strategic expansion. As a Roguelite colony sim, each run offers a unique map, but core principles remain consistent. Your primary goal is to establish a functional settlement, gather essential materials, and push deeper into the caverns to unlock permanent upgrades.

Begin by scouting your immediate surroundings. Your starting area always contains a few critical resources: loose stone, timber from ancient roots, and a shallow water source. Assign your initial colonists to gather these basics immediately. Build a simple shelter and a research bench as your first structures. Researching "Basic Mining" and "Simple Storage" should be your top priority, as they unlock the tools needed for sustained expansion. For more detailed starting strategies, check out our beginner guide.

Core Mechanics: Building and Management

Once you have a foothold, understanding the core mechanics of Into The Depths is vital. The game revolves around three key pillars: Resource Management, Colony Happiness, and Depth Progression.

• Resource Management: You'll manage wood, stone, food, water, and a unique resource called "Lumen Crystals." These crystals are found in deeper biomes and are used for advanced crafting and research. Always keep an eye on your stockpile; running out of food or water leads to rapid colony decline. Our resource management guide offers advanced tips.
• Colony Happiness: Colonists have needs. Providing beds, a communal fire, and varied meals keeps morale high. Unhappy colonists work slower and may even leave, jeopardizing your run. Build a "Tavern" structure early to boost happiness significantly.
• Depth Progression: You advance by building a "Mining Rig" and digging downwards. Each new "Stratum" introduces tougher enemies and rarer resources, but also better rewards. You must balance exploration with defense, as deeper areas are more dangerous.

Early Game Strategy: The First 10 Days

The first 10 in-game days are the most critical. Your goal is to achieve self-sufficiency before the first major threat arrives. Follow this structured approach:

1. Day 1-3: Gather surface resources. Build a small barracks (4 beds), a research bench, and a basic campfire. Assign two colonists to research "Basic Mining."
2. Day 4-6: Mine your first stone and coal. Construct a "Stone Furnace" for better crafting and a "Water Collector" for a reliable water supply. Begin farming "Glowshrooms" for a sustainable food source.
3. Day 7-10: Build a simple wall around your camp using stone. Craft basic weapons (stone spears) for all colonists. Research "Simple Defenses" to unlock spike traps. Position traps at your main entrance.

By day 10, you should have a stable food supply, basic defenses, and a small, fortified base. You are now ready to explore the first cavern layer. For a complete list of early threats, see our enemy types guide.

1. Secure Food and Water

   Your immediate priority is to prevent starvation and dehydration. Assign at least two colonists to gather wild berries and mushrooms. Build a "Rainwater Collector" near your camp. Once researched, transition to "Glowshroom Farms" for a passive, reliable food source.

2. Establish a Perimeter

   The underground is not safe. Hostile creatures like "Cave Crawlers" and "Stalkers" will attack at night. Build a wall of stone or wood around your core buildings. Leave one gap for a door or a trap corridor. This simple defense buys you critical time.

3. Research for Expansion

   Your research bench is the key to progress. Focus on "Logistics" to unlock faster storage and "Defense" for better walls and weapons. Avoid deep exploration tech until you have a stable base. Your research path directly impacts your survival odds.

Mid-Game Expansion and Exploration

Once your base is secure, it's time to expand. The mid-game (days 10-30) is about pushing into the second and third strata. This is where the Roguelite elements shine. Each new area presents randomized layouts and unique challenges.

• Exploration Teams: Form a dedicated team of 3-4 colonists equipped with torches, pickaxes, and weapons. Send them to explore branching tunnels. Mark resource nodes on your map for later collection.
• New Biomes: You will encounter biomes like the "Crystal Caverns" (rich in Lumen Crystals) and the "Magma Tunnels" (dangerous but with rare ores). Each biome has unique hazards, such as toxic gas or extreme heat. Prepare appropriate gear before entering.
• Permanent Upgrades: Dying is part of the game. Upon death, you return to the surface with "Knowledge Points." Spend these in the "Metaprogression Tree" to unlock permanent bonuses like faster mining, increased health, or new starting blueprints. This is the core of the Roguelite loop.

Boss Encounters and Final Objectives

Every major depth milestone is guarded by a boss. These are challenging encounters that require preparation and strategy. The first major boss, the "Crystal Guardian," appears at the bottom of the third stratum.

• Preparation: Before engaging any boss, ensure your colonists have the best available weapons and armor. Craft "Healing Salves" and "Stamina Potions." Build a forward operating base near the boss arena with a bed and storage chest.
• Boss Tactics: The Crystal Guardian has a predictable pattern: it slams the ground (AoE damage), shoots crystal shards (ranged attack), and summons small adds. Assign one colonist to tank the boss, one to heal, and the rest to focus on the adds first. Kite the boss around the arena to avoid its slam attack.
• Rewards: Defeating a boss unlocks the next stratum, grants powerful loot (like unique weapons or blueprints), and provides a massive boost to Knowledge Points. These victories are essential for long-term progression. For detailed strategies on all bosses, visit our boss guide.

Your ultimate objective is to reach the "Heart of the Depths" at the bottom of the final stratum. This is the endgame challenge. Success requires mastering all mechanics, from resource management to tactical combat. Each run brings you closer, building upon your accumulated knowledge. Good luck, and may your colony thrive in the darkness.