The Tank Build: Become the Ship Nothing Can Sink
There are two ways to win an exchange of cannon fire: hit harder, or last longer. The tank build in Dovion bets everything on the second option. You become the ship other players regret attacking — the one that soaks up the entire broadside, slowly swings its hull around... and finishes the fight still afloat while the attacker, out of patience, turns tail. This guide covers how to build that floating wall, which path to pick starting at level 5, and — most importantly — how to play it without falling asleep at the wheel.
The tank philosophy: buy time, not quick duels
In an .io game, dying is expensive: you lose your run's progress and whatever gold is still in your hold. The tank build flips that math. Every extra second you survive is a second the enemy is exposed, a third party might jump in, or you might reach a place to sell. You're not hunting the fast kill — you're making your death so exhausting to earn that nobody wants to pay the price.
In practice, that means three things:
- Spend your stat points first on what keeps you afloat, not on offense.
- Accept being slow: a tank that chases everyone stops being a tank and becomes an easy target.
- Stay near useful areas (selling points, islands) so your slowness never becomes a trap.
Which path at level 5?
At level 5, Dovion offers three directions: the Goélette (fast), the Brigantin (sturdy), and the Chalutier (big cargo hold). For a defense build, the Brigantin — the War path — is the natural choice: it's the branch built to soak up damage. At level 15, two lines fit the wall playstyle especially well:
- Broadsides (Frégate → Navire de ligne → Dreadnought): you fire back from both sides with the Grande Bordée (a full double broadside), and the Rideau de charbon (a smokescreen dropped in your wake) slows down pursuers. A tank that punishes anyone who gets close.
- Traps (Caboteur → Forteresse flottante → Brûle-Flots): the Estacades — floating log walls that block both ships and cannonballs — let you literally build your own fortress wall. The Forteresse flottante also carries the Fanal, which reveals invisible ships.
Positioning: your real armor
A badly positioned tank dies just like everyone else, only slower. Your nightmare: indirect fire. The Mortar line lobs shells in an arc that clear obstacles — including your Estacades and any islands. Against it, stay mobile despite your bulk and never camp the same spot for three minutes straight.
Use islands as a second layer of protection: hugging a coastline cuts down the angles you can be hit from. We cover this in detail in fighting around islands. And always keep an eye on your cargo hold: a tank loaded with gold draws bounty hunters like honey draws flies — sell timing matters twice as much when you're slow.
The wall's limits (and how to accept them)
Be honest with yourself: the tank build loses certain matchups. A fast harasser who refuses to engage in melee will run you in circles; if you can't punish it, ignore it and go about your business. Likewise, against a group attack, even the fattest Dreadnought eventually goes down — knowing when to disengage is part of the kit, and the art of retreat isn't reserved for fragile ships.
Your win condition is attrition. Impatient players burn their abilities on your hull, expose themselves, and that's when you convert. A wall that counterattacks at the right moment is terrifying.
Recap
- War path at level 5, then Broadsides or Traps at level 15.
- Stat points toward survival first, retaliation second.
- Position near islands and selling points, never isolated in open water.
- Sell often: a slow tank with a full hold is a bounty on legs.
- Watch out for the Mortar line and group attacks: disengaging isn't losing.
Want to test the wall right now? Play Dovion for free — the Brigantin is waiting for you at level 5.