Survive The Night TD Door Defense Guide
Keep door HP above zero — the only fail condition that matters.
Every Survive The Night TD match ends the same way if you slip: monsters break the door. Kills, pets, and fancy Tesla sparks are secondary. This guide teaches door-first thinking for Easy’s single door and Hard’s dual doors so your Roblox nights last the full wave count.
The fail condition
Door HP is the match timer you can see. When it hits zero, the house falls regardless of leftover Coins. Treat every Coin spend as either preventing door damage (DPS, slow, burn) or recovering it (Medical Base, repairs, door levels).
Medical Base and repairs
Medical Base is the dedicated heal structure — keep it in your loadout as soon as Lorenzo crates / progression allow. Combine it with manual repairs when a spike wave chunks the door. Waiting “until after I upgrade Mortar” is how Golden King finishes you on wave 15.
Repair discipline matters even more on Hard mode where two doors split attention. Rotate camera checks; do not tunnel on one entrance while the second bleeds out.
Placement geometry
- Claim a house with clear lane reads.
- Put primary DPS on the path monsters actually walk to the door.
- Seat Farm / Money Printer / Mining Cave where they are safe but still let you afford emergency repairs.
- Keep Medical Base in range to matter — a heal tower that never interacts with the door is a wasted slot.
- On two-door maps, mirror at least one damage tower per door before double-stacking a single chokepoint.
Crossbow starters should face the lane, not the wallpaper. Upgrade color tiers (red → diamond) on the towers that touch the door threat first — see Tower Upgrades.
Economy is door defense
Income towers look passive, yet they buy door levels and Medical Base tiers. A board with early Money Printer often out-survives a board with two fancy DPS towers and a level-1 door. Spend code Coins on survival before cosmetics.
Wave awareness
- Early Easy: Learn spawn rhythm; over-repairing is fine while you calibrate.
- Mid Easy: AoE (Mortar, Flamethrower, Cannon) prevents chip death by a thousand adds.
- Late Easy / Golden King: Pre-heal, pre-upgrade door, park Tesla if coin-fed.
- Hard bosses (Thorn Warden, Cursed Priest): Expect burst; pre-stage repairs and do not spend the last Coins on a vanity pink tier.
- Clans endless: Endurance > highlight DPS; badge waves 100 / 250 / 500 punish ignored micro-damage.
Boss encyclopedia: Bosses. Mode plans: Easy Mode, Hard Mode, Clans and Solo.
Loadout patterns that protect doors
Budget Easy: Farm · Crossbow · Medical Base · Cannon
Stable Easy: Money Printer · Mortar · Medical Base · Tesla
Hard split: Money Printer · Medical Base · Mortar · Tesla (flex fifth slot if owned)
Rankings: towers tier list. Roles: Players → Towers.
Pets and VIP — helpers, not crutches
Pets from Gem hatches (Bird Epic, Bear, Cannon pets) add support but never excuse a naked door. VIP’s 2x speed and interior space help you micro repairs faster; they do not auto-win. Scripts advertising auto-repair are cataloged under ATG Hub Auto Farm with a ban risk warning — learn manual door care first.
Checklist before every night
- Income tower in loadout
- Medical Base in loadout
- Door upgrade plan for first Coins
- Repair hotkey / UI memorized
- Codes redeemed for Coin buffer
- On Hard: both doors assigned coverage
Master door defense and Survive The Night TD becomes a strategy game instead of a jump-scare restart loop. Return here after Updates if heal amounts or repair costs change.
Frequently Asked Questions
Quick answers about codes, towers, doors, pets, and modes.
What happens if the door breaks?
The match fails immediately. Protecting and repairing door HP always outranks chasing kills.
Is Medical Base required?
Once unlocked, treat it as required for serious Easy finales and all of Hard. It heals the door directly.
How is Hard door defense different?
Hard uses two doors. Split towers and rotate repairs so one entrance is never ignored.
Should I upgrade the door or towers first?
Early door levels plus income, then Medical Base tiers, then major DPS color tiers.
Do pets heal the door?
Pets support your board but are not a replacement for Medical Base and manual repairs.