Into The Depths DLC Guide: Expansions & Content

All Into The Depths DLC Expansions Explained

Into The Depths, the Roguelite colony sim from developer SmelJey, launched on June 10, 2026, with a promise of post-launch content. While the base game offers a rich experience of building underground settlements and exploring caverns, several DLC packs have been announced to expand the world. This guide covers every confirmed Into The Depths DLC, detailing new biomes, enemies, and gameplay systems they introduce. Whether you are a new player or a veteran colonist, understanding these expansions helps you plan your adventures deeper into the abyss.

For an overview of the core experience, check our Into The Depths gameplay overview.

"The Abyssal Depths" DLC

The first major Into The Depths DLC, "The Abyssal Depths," introduces a new, terrifyingly deep layer below the existing caverns. This expansion focuses on vertical exploration, requiring players to build reinforced elevators and drill rigs to descend into the abyss. New resources like "Void Crystal" and "Abyssal Ore" appear here, essential for crafting advanced gear. The biome is home to hostile, bioluminescent creatures that require new strategies to defeat. This DLC also adds a new class of colonist specialized in deep-sea excavation.

If you are struggling with the base game's challenges, our beginner tips guide can help you prepare.

"The Sunken City" DLC

"The Sunken City" is a narrative-driven Into The Depths DLC that adds a procedurally generated urban ruin to explore. This expansion introduces ancient technology, automated defenses, and puzzle-like rooms. Players can salvage unique blueprints for turrets, generators, and decorative items. The DLC also includes a new faction of robotic guardians that react to player actions, offering both combat and diplomatic solutions. A new "Salvager" class character is included, with perks for finding rare loot in city tiles.

For more on character classes, see our class guide.

"The Fungal Frontier" DLC

The "Fungal Frontier" Into The Depths DLC transforms the mid-game with a sprawling fungal biome. This expansion adds spore-based mechanics, where players can cultivate mushrooms for food, medicine, and building materials. New enemy types include spitting spore pods and giant fungal walkers. The DLC introduces a "Mycology" skill tree, allowing colonists to become spore farmers or toxicologists. A new "Mycelium Network" feature lets you connect outposts for faster resource transport.

"The Crystal Caverns" DLC

"The Crystal Caverns" DLC focuses on resource refinement and base beautification. It adds massive crystal formations that can be mined for "Prismatic Shards," used to craft powerful light sources and defensive lasers. This Into The Depths DLC also includes a new "Geode" enemy type that explodes into damaging crystals. A new "Crystallographer" colonist class specializes in gem-related crafting. This expansion pairs well with the upgrades guide for optimizing your base.

"The Forge of the Deep" DLC

"The Forge of the Deep" is a content pack that revamps the crafting system. It adds a new "Deep Forge" building that allows for alloy creation and advanced weapon forging. This Into The Depths DLC introduces "Heat Management" as a mechanic, where players must cool their forges with water or risk cave-ins. New weapons like the "Thermal Lance" and "Obsidian Shield" are exclusive to this DLC. A new "Artificer" class can craft unique items from rare ores.

For weapon details, visit our weapons guide.

Free Updates and Future DLC Plans

Beyond paid expansions, Into The Depths receives free updates that add quality-of-life features and minor content. The developers have confirmed a roadmap including seasonal events and community-requested features. Future Into The Depths DLC may include a "Multiplayer" expansion, as hinted in developer diaries, though no official release date has been set. Stay tuned to the patch notes for the latest changes.

Frequently Asked Questions

Will Into The Depths DLC be cross-compatible? Yes, all DLC expansions are designed to work with each other and the base game. You can mix and match content from different packs.

Do I need to finish the base game to play DLC? No, each DLC adds content that becomes accessible at different stages of the game. However, some areas may be challenging for new players.

Are there any free DLC packs? The developers have released a "Starter Pack" free DLC that includes cosmetic items and a small biome. Check the Steam page for availability.

Can I refund Into The Depths DLC? Refund policies follow Steam's standard guidelines. DLC must be refunded within two weeks of purchase with less than two hours of playtime.