Whirlwind Battery evolves into Orbital Bombardment
The rocket-firing weapon is Whirlwind Battery, and its October-demo evolution is Orbital Bombardment with Liquid Green Stuff. Maximize the weapon, carry that passive, then collect an eligible boss chest to attempt the upgrade.
Whirlwind Battery rains missiles down from above. If you recognise that overhead attack, look for Whirlwind Battery by name when choosing your weapon upgrades.
The weapon, passive and evolved attack
| Item | Effect and how to get it |
|---|---|
| Whirlwind Battery | The base missile weapon. Unlock it by defeating 1,000 enemies across runs, then select it during a run and upgrade it toward its maximum. |
| Liquid Green Stuff | The passive paired with Whirlwind Battery in the October demo. It starts unlocked; carry it alongside the weapon for the evolution attempt. |
| Orbital Bombardment | The evolved attack calls down voidship barrages with much larger bombardment coverage. Obtain it through the Whirlwind Battery and Liquid Green Stuff evolution route. |
How to evolve Whirlwind Battery in the October demo
- Complete Whirlwind Battery's unlock objective by defeating 1,000 enemies across runs. Progress toward the weapon carries across attempts, so you can work on the objective before planning an evolution run.
- Select Whirlwind Battery during a run and keep upgrading it until it reaches its maximum. Simply owning the base weapon does not complete the evolution sequence.
- Take Liquid Green Stuff and keep it in the same loadout. This supplies the companion named by the October-demo recipe.
- Open an eligible boss chest after the weapon and passive are ready. On Imperial Bastion, the demo's boss chests list Evolution from minute 10 onward.
- Check the resulting weapon name for Orbital Bombardment. Its voidship barrages are the evolved form you are trying to reach.
What Orbital Bombardment changes
The upgrade changes the scale of the attack: Whirlwind Battery's missiles become barrages of fire from a voidship overhead. Orbital Bombardment provides much larger bombardment coverage than the smaller rocket attack.
Plan for that wider coverage when deciding which evolution to pursue. Keep enough room to move while the bombardment works, and judge the rest of your loadout by whether enemies are still reaching you through its coverage.
Why May and October recipes disagree
| Demo build | Whirlwind Battery pairing |
|---|---|
| May demo | Tape Measure appears in the older pairing list. |
| October demo | Liquid Green Stuff is the companion for Orbital Bombardment. |
Use Liquid Green Stuff when following this route in the October demo. A May chart that sends you toward Tape Measure belongs to the earlier demo build; combining instructions from those builds can leave you carrying the wrong companion.
Check these if the rockets do not evolve
Check the exact companion name before spending more upgrades. In the October demo, Whirlwind Battery needs Liquid Green Stuff; the older Tape Measure pairing is the first thing to correct.
Next, check the weapon's displayed upgrade state and whether you have opened an eligible boss chest since completing the pair. Collecting Liquid Green Stuff alone is not the chest step in the evolution sequence.
Keep this walkthrough scoped to the October demo. When moving to the full release, check the recipe in that build's Armoury before committing your passive choices.