Humble

For now, only comes with a Steam key.

itch.io

With each itch.io purchase, a free Steam key may also be requested. itch.io builds may lag behind Steam at times, so the Steam key is the recommended way to use this package until distributing builds is more automated.

Steam

Antistatic can be found on the Steam store:
https://store.steampowered.com/app/944500/Antistatic