Into the Backrooms TD Units

Units System Overview

This wiki covers Into the Backrooms TD (Roblox Game ID 123446017566246) by the Backrooms Tower Defense group — not Backroom Tower Defense (10498602208), not [TRADE] Backrooms Tower Defense (17480843538), and not The House TD. Always verify you are in the correct experience before redeeming Codes or Trading.

Units — also called towers — are the deployable defenders you place on Backrooms levels in Into the Backrooms TD. Each unit has a rarity, role, combat type, and upgrade path. Summon units from lobby crates using Coins and Gems earned through levels, Codes, and Trading.

Explore All Units, Remake Crate, Talents, Usable Items, Secret & Rare Units, and Summon Guide. Cross-reference Units Tier List for meta strength on Game ID 123446017566246.

Rarity Tiers

Six rarities exist: Common, Uncommon, Rare, Epic, Legendary, and Secret. Higher rarities have stronger base stats, better abilities, and higher Trading value. Secret units are mega-rare chase targets with unique mechanics.

The current roster includes 14 tracked units from Survivor (Common starter) through Mega Rare Tower (Secret summon exclusive). Developers add units through crate pool updates and events.

Duplicate units feed Trading or future craft systems. Never sell your only Epic or higher copy before checking build relevance.

• Common / Uncommon — Early game
• Rare / Epic — Mid game core
• Legendary — Endgame staples
• Secret — Mega-rare chase units

Roles and Team Building

Roles include DPS, AoE, Support, Debuff, DoT, Melee, and All-rounder. Balanced teams mix one debuff, one AoE, and multiple DPS types for Class 3+ content.

Use Team Builder to plan six-unit squads before summoning. Chasing random high-rarity units without role coverage wastes crate investment.

Mega-rare towers from crates redefine late-game strategy — a single Secret pull can replace three lower-tier slots when upgraded. Read How to Get Rare Towers for odds and pity tips.

Unit Stats and Balance Patches

Approximately 50 units received reworks in the Into the Backrooms TD mega update, shifting DPS numbers, ability cooldowns, and debuff uptime across the roster on Game ID 123446017566246. Wiki role descriptions reflect post-rework behavior — fan Trello boards showing pre-patch Smiler debuff percentages mislead players upgrading wrong units.

Talents and usable items from recent updates slot into unit builds rather than replacing roster members. Max base unit upgrades before chasing item optimization — a level 3 Entity 67 with default talents outperforms level 1 Frowner with premium items in most Class 4 boss encounters documented in Boss Guide.

Track Units Tier List after every patch before investing upgrade currency. Yesterday's S-tier carry may drop to A-tier while a reworked Epic climbs — sunk upgrade costs hurt more than delayed summoning.

Collection vs Competitive Roster

Collecting every 14 roster unit differs from building a competitive six-unit loadout. Collection completion motivates crate sessions and Trading; competitive play requires role-optimized teams from Team Builder regardless of collection percentage. Survivor (5 trade value) fills collection slots but not Class 3+ loadouts.

Duplicate policy: keep one copy of every Epic or higher for build flexibility; trade extras above Epic rarity via fair Trading toward missing meta units. Sell or hold Common duplicates based on inventory space — they hold minimal trade value on value charts.

Secret chase units — Frowner, Gaming Master, Mega Rare Tower — represent long-term collection goals beyond standard crate pools. Obtain methods on Secret & Rare Units include craft, hidden discovery, and summon exclusives beyond Normal Crate luck alone.