Factory Floors, Roof Purchases, and Helipad Construction
Find upper-floor construction pads, build the third-floor production line, unlock The Roof purchase, and buy the $1.5M Helipad for rooftop deliveries.
Upper-floor expansion uses construction pads near stair openings and conveyors. Follow the third-floor building sequence to start Sky Belt production, then work through the later roof purchases and rooftop Helipad.
Buy Third Floor Trusses, then Third Floor, and climb the central dark lattice frame through the floor opening. Upstairs, buy Sky Belt and Sky Dropper to start production. At the later top-floor stage, Top Floor Walls unlocks Roof Trusses, which reveals The Roof. Once you reach the rooftop facility area, step onto your side’s $1,500,000 HELIPAD pad to trigger the first supply delivery.
Find Walkways and the upstairs purchase pads
Use construction pads on your own factory side, with enough cash for each purchase. If a message says a button belongs to your teammate, return to the corresponding buttons on your side.
For Walkways, look in the grass beside the wall and three weapon display circles. Step onto the white square pad to build gray columns, dark lattice supports, and overhead beams. A nearby Laser Fence purchase appears afterward; continue with the base defense guide if you want to build out that entrance.
On the existing upstairs level, Upstairs Belt costs $7,500 cash. Its pad is under the windows near the stair opening. Buying it creates another conveyor and reveals production purchases for that line. This is a separate conveyor from the third floor’s Sky Belt.
The structural purchases below cover Walkways, the third-floor supports and floor, and the later top-floor-to-roof chain.
| Name | Purchase price |
|---|---|
| Walkways |
4000 cash
|
| Third Floor Trusses |
25000 cash
|
 Third Floor |
90000 cash
|
| Top Floor Walls |
1000000 cash
|
| Roof Trusses |
1250000 cash
|
| The Roof |
1750000 cash
|
Build the third floor and start Sky Belt production
Start on the existing upper floor. The supports, floor, Sky Belt, and Sky Dropper cost $220,000 cash combined, excluding earlier construction and later upgrades. You can buy them separately as you earn the money.
- Find Third Floor Trusses between the stair opening and conveyor. Step onto its white $25,000 pad. Dark vertical supports appear, along with the Third Floor purchase.
- Go around the central stair opening to the foot of those supports beside the conveyor. Step onto Third Floor and pause briefly to purchase the $90,000 floor.
- Climb the central dark lattice frame. Continue upward through the opening in the new floor to reach the third-floor platform.
- Step onto the cyan Sky Belt pad to build the conveyor, then buy Sky Dropper from the newly revealed green pad.
| Production purchase | Cash cost | When to buy it |
|---|---|---|
| Sky Belt | $75,000 | After reaching the built Third Floor |
| Sky Dropper | $30,000 | After building Sky Belt |
If you approach from the outer wall, cross the connecting platform with green railings, pass through the doorway, and circle the stair opening to reach the Third Floor pad.
If Sky Dropper does not build on your first contact despite having enough cash, step away and back onto the pad, as the player does in the building sequence. Once built, its glowing cyan-white machinery drops blocks onto the conveyor, and Forge Dropper appears as the next machine purchase. Use the factory upgrade directory for the following machines and belt upgrades.
Build and climb to the third-floor production line▶ Watch demonstration
Unlock The Roof through walls and trusses
At the later top-floor stage, follow the Top Floor Walls → Roof Trusses → The Roof purchase chain. These three purchases total $4,000,000 cash, excluding earlier floors and rooftop facilities.
- Step onto Top Floor Walls with $1,000,000. Gray wall frames and green window panels appear, and Roof Trusses becomes available.
- Go to the conveyor end beside the floor opening. Buy Roof Trusses from its white $1,250,000 pad to build the dark roof supports.
- Find the newly revealed The Roof pad in front of the vertical supports. This next purchase costs $1,750,000.
If you are short of cash and have a ready playtime reward, open Gifts, enter Play Rewards, and select Claim on the ready card. The building example uses the 30-minute card labeled 1 MIN INCOME to help fund Roof Trusses. Check the reward menus and claim requirements for the available cards, then return to construction.
Build the Helipad and recognize a supply delivery
Once you are in the rooftop facility area, the Helipad costs $1,500,000 cash.
- Find HELIPAD $1.5M on your side of the roof. Its pad is red when you cannot afford it and turns white when you have enough cash.
- Walk onto the pad. A black landing platform with a yellow circle and H appears, and the helicopter delivery sequence begins.
- Wait for the green crate with gray bands to land in the platform’s center. The helicopter leaves, and the display changes to NEXT DROP.
| Rooftop display | Meaning |
|---|---|
| SUPPLY DROP INBOUND | A delivery is approaching |
| NEXT DROP with a countdown | The timer shows the remaining wait for the next delivery |
Read the countdown as time remaining. For example, 4:42 means that much time is left on the displayed timer; it is not the full delivery interval.
The green rooftop crate identifies a Helipad delivery. For the orange crates found outside the factory during Air Drops, use the map events and supply drop guide.
Find the rooftop Airstrike Uplink
Airstrike Uplink is another rooftop facility purchase, near the Helipad and Minigun pads. Look for the floor pad marked AIRSTRIKE UPLINK $2M on your own side.
The $2,000,000 cash price is the facility’s construction cost. In the Rebirth menu, its status changes from NOT YET before ownership to OWNED after ownership. See Airstrike Uplink and other strike options for the attack-related entries, or rebirth requirements when checking your reset progress.