The “Generation Zero: Complete Bundle 2026” with the open-world shooter and all of its DLC is now available on Humble Bundle.
It includes the main game Generation Zero plus 18 add-ons, among them the expansions Alpine Unrest and FNIX Rising, several weapon packs, the Motorbikes Pack and the Base Defense Pack.
The tiers are €7.14 (11 items) and €10.72 (all 19 items) as Steam keys. Part of the proceeds goes to the World Wildlife Fund. The bundle runs for about 21 more days.
Your once idyllic home has been invaded by lethal machines, and only you have the tools to stop them from taking over the world. Enter the vast open world of Generation Zero with this bundle of the iconic stealth shooter game and all of its DLC! Get started with the core game, set in a small Swedish town whose roads and wilderness are overrun with killer robots that all want a piece of you! Upgrade your experience with handy extras like tactical equipment, retro Soviet weapons, and cool motorbikes to take the fight to the streets! Take on the machines and fight for the future of humanity in the complete Generation Zero bundle! Pay what you want and support World Wildlife Foundation with your purchase!
Keys expire. Please redeem keys before 06/05/27.

The bundle page does not state Linux support. Steam keys must be redeemed by June 5th, 2027.
Source: Humble Bundle