- The House TD 2 floor 3 guide covers all five Mad Labs rooms and their boss waves.
- Room layouts range from simple single-exit paths to difficult multi-exit breach routes.
- Boss preparation matters most in Rooms 4 and 5, where health values increase sharply.
- Mythic units provide a strong baseline for the reported Floor 3 encounters.
- Rewards include coins, player XP, faction XP, and possible mini-boss drops.
The House TD 2 floor 3 guide: Mad Labs Overview
The House TD 2 floor 3 guide is built around five Mad Labs rooms, each with its own entrances, exits, boss schedule, and defensive pressure. Floor 3 is part of the campaign progression listed on the THE HOUSE TD Wiki Floors page, where Floor 3 appears alongside the other campaign floors.
The early rooms are relatively manageable because they offer straightforward paths and limited breach pressure. The final room, Mastermind's Core, is the main difficulty spike. It combines multiple entrances, three exits, two breach points, and a final boss with a reported 495,000 HP.
Video Highlights:
- Room layouts, entrances, exits, and defensive choke points
- Boss waves for every Floor 3 room
- Reported enemy health values and room rewards
- Practical observations for using Mythic units and speed controls
| Room | Name | Main Route Profile | Difficulty Focus |
|---|---|---|---|
| 1 | Slime Bats | Three entrances, two exits | Early boss timing |
| 2 | Kennels | Three entrances, one exit | Dense boss groups |
| 3 | Operating Theater | Three entrances, one exit | High-health final boss |
| 4 | Containment Breach | Three entrances, three exits | Multiple escape routes |
| 5 | Mastermind's Core | Four entrances, three exits, two breach points | Final-wave pressure |
Before starting a room, inspect its information panel and identify the exit with the longest approach. That route usually gives your damage dealers more time to work.
Rooms 1–2
- Simple defensive layouts
- One or two major boss checks
- Good for testing placements
Room 3
- Single-exit defense
- Three boss stages
- Dread Stitch is the final threat
Room 4
- Three exits
- Central choke point
- Mutated Noob closes the room
Room 5
- Four entrances
- Two breach points
- Mastermind appears on wave 21
Rooms 1 and 2: Early Floor 3 Bosses
Rooms 1 and 2 introduce the enemy pacing used throughout Floor 3. Their layouts are more forgiving than the later rooms, but the boss waves still reward careful placement. Focus your strongest damage near turns or shared lanes instead of spreading units evenly across the entire map.
In Slime Bats, the two exits make back coverage important. Frankenstein appears before Slimer, so your opening setup must be ready for an early boss without sacrificing the final approach. Slimer has the larger reported health pool and should be treated as the real room check.
| Room | Boss | Wave | Reported HP | Tactical Note |
|---|---|---|---|---|
| Slime Bats | Frankenstein | 9 | 72,450 | Prepare for the first boss before the middle waves |
| Slime Bats | Slimer | 15 | 247,500 | Keep back coverage for the two-exit layout |
| Kennels | Mad Scientist | 11 | 43,200 each, three enemies | Use area damage if the group arrives together |
| Kennels | Feral Cat | 17 | 279,000 | Save a strong damage cycle for the final wave |
Slime Bats
Slime Bats has three entrances and two exits. The reported bosses are Frankenstein on wave 9 and Slimer on wave 15. Frankenstein is listed at 72,450 HP, while Slimer is listed at 247,500 HP.
A practical setup is to establish a reliable damage zone near the route intersection, then place additional coverage toward the rear exit. If your units can defeat normal enemies comfortably, avoid overcommitting resources before wave 9. The later Slimer encounter is the more demanding test.
The reported room reward is approximately 300 coins, with 60 player XP and 60 faction XP, plus possible mini-boss drops. Treat the coin figure as a field estimate rather than a guaranteed value, since reward boosts can change the displayed result.
Kennels
Kennels has three entrances and one exit, creating a more concentrated defense. The Mad Scientist appears on wave 11, with three reported enemies at 43,200 HP each. The final Feral Cat appears on wave 17 and is listed at 279,000 HP.
Because every enemy must reach the same exit, this room benefits from a focused kill zone. Prioritize upgrades that improve sustained damage, range, or crowd control. A single-exit layout also makes it easier to reinforce the final stretch if the Feral Cat survives longer than expected.
The reported reward is approximately 350 coins, along with 60 player XP and 60 faction XP, plus any mini-boss drops collected during the room.
Speed controls can make early waves pass quickly, but avoid using the fastest setting when a boss is approaching. Confirm that your main damage units are upgraded before wave 9, 11, or 15.
Rooms 3 and 4: Mid-Floor 3 Pressure
Rooms 3 and 4 mark the point where Floor 3 begins demanding stronger damage coverage. Operating Theater still offers a single-exit defense, but its final boss has a reported 315,000 HP. Containment Breach is less forgiving because three exits can force your units to cover several routes at once.
| Room | Layout | Boss Schedule | Reported Boss HP |
|---|---|---|---|
| Operating Theater | Three entrances, one exit | Lab Guts wave 7; Doctor wave 12; Dread Stitch wave 18 | 54,000 each; 117,000; 315,000 |
| Containment Breach | Three entrances, three exits | Creation wave 10; Caged Mutants wave 15; Mutated Noob wave 19 | 139,500; 81,000 each; 405,000 |
Operating Theater
Operating Theater has three entrances and one exit. The first boss event is Lab Guts on wave 7, with three reported enemies at 54,000 HP each. Doctor arrives on wave 12 at 117,000 HP, followed by Dread Stitch on wave 18 at 315,000 HP.
The single exit gives you a useful advantage: damage placed near the final bend can affect every boss. Start by building a dependable central formation, then expand toward the back only if normal enemies begin leaking. The boss schedule is spread across the room, so avoid spending every upgrade before Lab Guts.
The reported reward is approximately 361 coins, with 60 player XP and 60 faction XP, along with possible drops from mini-bosses. Mythic units are described as a comfortable baseline for this encounter, but the exact result depends on unit levels and placement.
Containment Breach
Containment Breach has three entrances and three exits, although the room also provides a central choke point that can help consolidate damage. Creation appears on wave 10 at a reported 139,500 HP. Two Caged Mutants arrive on wave 15 at 81,000 HP each, and Mutated Noob appears on wave 19 at 405,000 HP.
The best general approach is to use the central choke point as your primary damage area while maintaining enough coverage for every exit. Do not place all units at the first entrance. That strategy may clear regular enemies quickly but can leave the final route underdefended when the boss chooses a less favorable path.
The reported reward is approximately 391 coins, plus 60 player XP and 60 faction XP and possible mini-boss drops.
If your team consistently clears Operating Theater but struggles in Containment Breach, improve route coverage before chasing more damage. Three exits are the central challenge.
Recommended Defense Priorities
| Priority | Placement Goal | Why It Matters |
|---|---|---|
| 1 | Cover the central choke point | Maximizes repeated attacks on shared routes |
| 2 | Protect the farthest exit | Prevents long-path leaks after boss movement |
| 3 | Upgrade sustained damage | Helps against high-health bosses |
| 4 | Keep one flexible slot | Allows emergency coverage near a weak lane |
Room 5: Mastermind's Core Walkthrough
Mastermind's Core is the final and most demanding room on Floor 3. It has four entrances, three exits, and two breach points. The room information lists House Experiment on wave 8, Abomination on wave 20, and Mastermind on wave 21.
| Boss | Wave | Reported Quantity | Reported HP | Main Concern |
|---|---|---|---|---|
| House Experiment | 8 | Two | 58,500 each | Arrives before the final sequence |
| Abomination | 20 | Four | 135,000 each | Large group creates sustained pressure |
| Mastermind | 21 | One | 495,000 | Final boss can use multiple routes |
The room is easier to control when you prepare before wave 8 instead of reacting after the first House Experiment appears. Place high-value damage where paths overlap, then reserve at least one flexible unit or upgrade for a breach point.
Build the Shared Damage Zone
Identify the route intersection or the longest visible path and place your strongest range-based damage there. This area should attack enemies from multiple entrances whenever possible.
Prepare for House Experiment
Before wave 8, confirm that both House Experiment enemies can be targeted consistently. The reported health is 58,500 each, so early leaks indicate a placement or upgrade problem rather than a final-boss issue.
Reinforce Before Abomination
Use the waves before 20 to improve sustained damage and add coverage near the exits. Four Abominations are reported at 135,000 HP each, making area damage and reliable targeting especially valuable.
Control the Mastermind Route
On wave 21, watch which route the Mastermind takes and move or upgrade flexible units if the room allows it. The reported 495,000 HP makes backline coverage essential.
The reported reward for Mastermind's Core is approximately 433 coins, with 60 player XP and 60 faction XP, plus possible rewards from mini-bosses. Coin boosts may change the amount displayed during a run, so use the base estimate for planning rather than treating it as a fixed payout.
Mastermind's Core has more route pressure than the other rooms. A formation that succeeds in Operating Theater may still fail here if it cannot cover three exits and two breach points.
Floor 3 Preparation and Rewards
Use this preparation routine before repeating Floor 3. The goal is not to fill every placement slot immediately; it is to create a stable opening, preserve upgrade resources, and respond to the room layout.
Floor 3 Readiness Checklist:
- Inspect the room information panel before placing units
- Identify every entrance, exit, and breach point
- Place a shared-route damage core before speeding up waves
- Reserve coverage for the final boss route
- Record coin and XP results separately from boost bonuses
| Room | Approx. Coins | Player XP | Faction XP | Best Repeat Reason |
|---|---|---|---|---|
| Slime Bats | 300 | 60 | 60 | Simple early-room practice |
| Kennels | 350 | 60 | 60 | Single-exit farming route |
| Operating Theater | 361 | 60 | 60 | Three-boss progression check |
| Containment Breach | 391 | 60 | 60 | Higher coin estimate and route practice |
| Mastermind's Core | 433 | 60 | 60 | Highest reported room payout |
Suggested Progression Route
Start with Slime Bats if you are still learning the Floor 3 enemy pacing. Move to Kennels once your opening defense can handle the Mad Scientist group without emergency spending. Operating Theater is a useful test of single-exit damage, while Containment Breach checks whether your formation can cover multiple exits.
Mastermind's Core should be your final benchmark. If the first four rooms are comfortable but Room 5 fails, focus on route coverage and timing rather than simply increasing speed. The final room's structure is the important difference.
Write down your base coin result, XP result, and mini-boss drops separately. This makes it easier to compare runs when a temporary coin multiplier affects the displayed payout.
Q: What is the hardest room in The House TD 2 floor 3 guide?
Mastermind's Core is the hardest reported room because it has four entrances, three exits, two breach points, and a final Mastermind boss listed at 495,000 HP.
Q: Which Floor 3 room has the simplest defense?
Kennels has one exit, so it is generally easier to consolidate damage there. However, the Feral Cat on wave 17 is still listed at 279,000 HP.
Q: When does Mastermind appear in Floor 3?
Mastermind appears on wave 21 in Mastermind's Core, after the reported Abomination encounter on wave 20.
Q: How much XP does each Floor 3 room provide?
The reported room results list 60 player XP and 60 faction XP for each room, while coin totals vary by room and may be affected by boosts.