The sneaky striker — long reach, must surface to shoot
I-400 Sen-Toku
Toughest water HP, slowest, tiny magazine, huge 7.2-tile missile/torpedo reach. Claims water, threatens anything from the coast — but every missile surfaces the boat and invites anti-air.
At a glance
- Where it goes
- Water — two population, heavy
- Health / Speed / Magazine
- 250 HP / slow / 4 shots before a long reload cycle
- Gun
- Heavy torpedo vs subs, heavy missile vs everything else — soft vs buildings/HQ by design
- Stealth
- Submerged it still scouts about 8.0 tiles and is almost invisible; revealed for a short window after surfacing or Radar
I-400 submarine
I-400 subs strike from long range but must surface to fire, briefly revealing them to Radar. Four torpedoes before you need to rearm.
By the numbers
An I-400 hits like a truck — per shot it's the hardest in the roster — but it cycles slowly. Against land and especially against HQs and buildings, its missiles are deliberately softened so four subs can't erase an HQ from offshore in seconds; they need the better part of a minute uncontested. Torpedoes vs other subs are full power.
| Sub shoots at | How it feels |
|---|---|
| HQ (1,800 HP) | Plink — four subs need about a minute |
| Support building (620 HP) | Plink — still a long siege |
| Maus (400 HP) | Heavy — about fourteen seconds solo |
| Sea Shadow (180 HP) | Heavy — about half that |
How to use it
Creep along the waterline offshore near the enemy HQ, focus the HQ, fire, and move — every missile surfaces you and anti-air will answer. A submerged I-400 is great at sitting still on a buoy or a quiet coast and waiting, then popping up to shoot and sliding. Don't knife-fight without Radar.
The Pen
A Sub Pen is a coastal dock that quietly auto-launches a new I-400 about every 30 seconds for modest supply, up to four. It's not a queue — when the timer hits zero and you have the supply and population, a new boat just slides into the water and logs it.
Buoys are your buoy
Only subs can flip sonar buoys. A Sea Shadow on a buoy does nothing for capture, but it can kill the enemy sub that is flipping it. Pair subs with boats: subs flip, boats screen.