Field Manuals Written by commanders

The OTTTD Arena field manual

Walkthroughs, boss strategies, class theorycraft and lore dossiers — everything the HEROCORP™ training division publishes, minus the parts we're legally required to redact.

Jaws of the Sky: Surviving the Flying Zombie Shark

// Featured Dossier

The boss everyone asks about

Twenty-five missions build to one absurd, beautiful fight: a giant flying zombie shark that invalidates ground coverage and tests every anti-air pad you own. Our most-read guide breaks the fight into phases, loadouts and the exact moment to trigger actives.

Phase-by-phase boss breakdown
Anti-air grid blueprints
Budget and squad alternatives

Read the strategy

Boss Guides Walkthroughs Squad Theory Tower Science Endless Ops Lore Dossiers

Boot Camp Bay to Clawline Crossing: Early Campaign Walkthrough

The first three missions done right — lane discipline, economy pacing and which towers earn their pads.

Walkthroughs10 min read

Kraken Takedown: The Complete Act I Boss Guide

Damage windows, sell-and-rebuild timing, and why your railguns betrayed you at the worst moment.

Boss Guides8 min read

Jaws of the Sky: Flying Zombie Shark Strategy

Phase management, anti-air coverage and the cooldown timing that turns panic into procedure.

Boss Guides12 min read

Breaking the Wartoise: Armor-Strip Doctrine

Saboteur compositions, sustained fire lines and the math behind shell phases.

Boss Guides7 min read

All 7 Hero Classes, Ranked for the Current Meta

Who earns a slot in your three-hero drop squad — and who waits in the cloning bay.

Squad Theory11 min read

12 Towers, 6 Damage Types: The Matrix Guide

Every tower matched against every armor class, condensed into the reference chart we actually use.

Tower Science14 min read

Endless Mode Doctrine: Surviving Past Wave 50

Economy pacing, sustain comps and cloning-bay management for the long haul.

Endless Ops9 min read

Steamcrust Field Notes: Lore of the Rusted Shores

Where steampunk crustaceans came from, who built the Gearworks, and what the Kraken wants.

Lore Dossiers6 min read

Nightmare Dimension: The Complete Survival Guide

Horror faction resists, flying waves and how Act II rewrites every habit Act I taught you.

Walkthroughs13 min read

tempa-death™ Economics: The Cloning Bay Explained

What hero death actually costs, when to eat the queue, and why Medics pay for themselves.

Squad Theory8 min read

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// Editorial Standard

Written by people who actually S-rank

Every guide on this board is tested on live builds by commanders with top-500 endless placements. When a patch moves the meta, the manual gets rewritten — we don't leave stale doctrine on the shelf.

About the studio

ACTIVE MANUALS

25+

MISSIONS COVERED

PAYWALLED GUIDES

FLYING SHARK

// Reading Room

About the manuals

How the field manual desk works and where to send your own doctrine.

Every field manual is free, forever. Arena services exist for players who want coaching or gear — the written doctrine stays open to all commanders.

Each manual carries a tested-on-build note and gets revised when balance patches land. If something reads stale, flag it via the contact desk and it goes back to review.

Yes — requested topics go into the writing queue by demand. Mission-specific walls and endless breakpoints are the most-requested subjects; send yours through the contact form.

Exceptional community doctrine gets edited, credited and published under the contributor's callsign. Pitch us the outline first — we answer every pitch.

// Knowledge Is Ordnance

Theory's done. Field test it.

Reading about the Kraken is one thing. Facing it is another. The mission board is waiting, commander.

Mission board Arena offers