Fortblox: Mobile Fortress Go! lets you construct a tank on legs using salvaged parts

The Setup: A World That Ran Out of Energy

The premise behind Fortblox: Mobile Fortress Go! is blunt: its world ended because it ran out of energy. What's left is a wasteland where survivors get around in enormous steel fortresses — a look the game's own write-up admits sits somewhere between Mad Max and Mortal Engines, though perhaps closer to Howl's Moving Castle, if Howl had been handed a crate of spare parts and a lot of guns.

Your fortress starts as a pile of scrap. From there, the game hands you around 40 types of blocks and roughly 100 weapons and characters to bolt on. Placement matters: where each piece sits changes how the fortress attacks and how long it survives a fight.

The Core: You Build, the Game Fights

The key mechanic is Docking Synergies. Connect blocks with different attributes and you trigger effects, meaning the same parts stacked a different way can play out completely differently in combat.

One caveat worth knowing before you download: the fighting runs itself. This is firmly in auto-battler territory, and your job is the construction, not the clicking. How deep those synergies go once the numbers start to matter is harder to judge if — like the reviewer who covered the launch — auto-battlers and deckbuilders aren't where your hours usually go.

Where You Test Your Designs

Once your creation actually rolls, Fortblox offers three main proving grounds:

• Parts Dungeon — endless waves of enemies, cleared in exchange for new fortress parts
• Giant Boss Challenge — a check on whether your block combination holds up against something much bigger than you
• The Arena — your fortress goes up against designs built by other players

The Launch Offer

Fortblox is available now on iOS and Android. New players receive Rapid Growth Supplies to speed up the early stretch, and welcome missions plus launch events add up to more than 1,000 free summons.

That's a generous number by mobile standards — though it's fair to be a little skeptical, since publishers rarely hand out a thousand of anything unless there's a shop selling the rest.

Where Things Stand

The game is live on both platforms with its launch events running, so the 1,000-plus summons window is open now. If you want more armies that fight on their own, our list of the best auto-battlers on mobile covers the rest of the field — though most of those travel on foot rather than on wheels.