Resposta rápida
On Day 3 the objective reads Something is gathering in the corridor. Check the peephole, then drag the couch to the marked brace position and add more furniture; a chair can jam the handle. After the attack the game says furniture braces hold far better than a lock alone. By Day 8 you repair and brace the door again before night.
Dados principais

Vídeo
“30 Floors Up - Longer gameplay - Survival Zombie Game - More attacks, open more doors - Roblox” de Calculus Physics Chem Accounting Tam Mai Thanh Cao no YouTube, a partir de 38:30.Assistir no YouTube
The order we saw
Check the peephole when the corridor warning appears, drag the couch to the marked spot, then pile on furniture. The attack follows; afterwards the objective says rest and repair.
The braces need upkeep: Day 8's objective is to repair and brace the door before night, and Day 14 mentions furniture and boards.
O que ainda não vimos
We haven't seen how many hits a brace takes or which furniture holds best. Those numbers aren't shown in the footage we've checked.
Tips
- Don't wait: brace as soon as the corridor warning appears.
- Repair the brace before each night once the first attack has gone.
- A weapon is for when the barricade fails.
FAQ
How do you barricade the door in 30 Floors Up?
Drag the couch to the marked brace position on Day 3, add more furniture and jam the handle with a chair.
When do zombies first attack in 30 Floors Up?
On Day 3 in the long co-op run: the objective reads Something is gathering in the corridor.
Do you need to repair the barricade?
Yes, Day 8's objective says to repair and brace the door before night.
Fontes
- 30 Floors Up - Longer gameplay (Calculus Physics Chem Accounting Tam Mai Thanh Cao, YouTube): Day 3 attack
- Roblox Experience 30 Floors Up By Dateline NBC Basic Overview (MBT, YouTube)
- 30 Floors Up on Roblox (game page and game pass list)


