Into The Depths Unit Types Guide
Medium threatUpdated 2026-06-10

Overview of Unit Types
In Into The Depths, your colony's survival depends on managing diverse unit types, each with unique roles in exploration, combat, and resource gathering. Understanding these units is critical for progressing through the caverns and conquering the deep. This guide covers all unit types available in the game, their abilities, and how to deploy them effectively.
Basic Worker Units
Worker units form the backbone of your settlement. They are responsible for collecting resources, constructing buildings, and maintaining infrastructure. The primary worker unit is the Miner, which excels at extracting stone, ore, and other materials from the cave walls. Miners have low health and no combat capabilities, so they must be protected from hostile creatures. You can find more about resource gathering in our resource management guide.
Combat Units
Combat units are essential for defending your colony and clearing new areas. The Scout is a fast, light unit ideal for exploring dark tunnels and revealing the map. Warriors are balanced melee fighters with moderate health and damage, suitable for early-game skirmishes. For tougher encounters, Heavy Guards provide high defense and can absorb significant damage. Ranged support comes from Archers, who deal damage from a distance but are vulnerable in close combat. For advanced strategies, see our beginner guide.
Specialist Units
Specialist units offer unique abilities that can turn the tide of exploration. Engineers can repair structures and build defensive turrets, making them invaluable in prolonged sieges. Medics heal nearby units, reducing downtime after battles. Sappers are explosive experts who can destroy obstacles and deal area damage to enemy groups. These units require specific upgrades to unlock; check our upgrades guide for details.
Elite Units
Elite units are rare, powerful versions of standard units, often found in deeper caverns or as rewards for completing challenges. The Shadow Knight is a stealthy melee unit that deals critical damage from behind. Flame Caster unleashes area-of-effect fire attacks, perfect for clearing hordes. Crystal Golem is a massive, slow-moving tank with immense health and the ability to stun enemies. Unlocking elites typically involves progression milestones; refer to our progression guide for more.
Unit Synergies and Tactics
Building a balanced army is key to success. Pairing Scouts with Warriors allows you to scout ahead while maintaining a defensive line. Medics should always accompany Heavy Guards in prolonged fights. For boss encounters, combining Sappers with Archers can maximize damage while keeping units safe. Experiment with different compositions to adapt to enemy types. For more tips, see our tips and tricks guide.
Remember to upgrade your unit types at the workshop to enhance their stats and unlock new abilities. Prioritize Miner upgrades early for faster resource income.
Frequently Asked Questions
How do I unlock new unit types? New unit types are unlocked by progressing through the tech tree and reaching certain depths. Check the in-game progression menu for specific requirements.
Can I train multiple units at once? Yes, you can queue unit training at the barracks. Advanced buildings allow for parallel training, speeding up army assembly.
What is the best unit for early game? Miners and Warriors are your best bet. Miners provide resources, while Warriors handle basic threats. Avoid investing in elites until you have a stable economy.
Related pages
- Elite Enemies Guide— Learn about all elite enemies in Into The Depths, their unique abilities, loot drops, and strategies to defeat them in the underground caverns.
- Enemy Types Guide— Learn about all enemy types in Into The Depths, from basic creatures to elite foes. Discover their behaviors, weaknesses, and how to survive the depths.
- Entity index
- Game page