TrenchLine:Tower Defense Flood Update and Event Guide

What the Flood update changed

The Flood update line turned TrenchLine:Tower Defense into a two-domain war: roads and water. v0.24.0 introduced the Flood push; v0.25.0 continued with Flood Stage 2. Maps such as Flooded Ruins, Breakwater Port, and Tidefall Beach expect boats, barges, and air answers—not just MG walls on dry dirt. This guide explains flooded map habits, naval troops, Fleet Command, Depth Chargers, flyers, and how the event mindset differs from classic Farmland Lake clears.

Deep dive companions: Maps for layout geometry, Naval Tokens for Hardcore-only Fleet Command currency, Hardcore Tidefall for the 40-wave exam, Patch Notes for version specifics, and the Updates hub for chronological context. Troop stats and roles live on Troops.

Flooded maps at a glance

Map	Flood mindset
Flooded Ruins	Mixed ruins and water; seal both path types early
Breakwater Port	Harbor geometry; boats and shore MG must cooperate
Tidefall Beach	Full naval identity; Hardcore adds craft, tokens, Behemoth
Frozen Channel	Cold channel pressure; respect water sightlines
Farmland Lake	Still a teaching map; water matters less than Flood ports

If your muscle memory is “place rifles on the dirt and AFK,” Flood maps will leak on the water lane while you stare at shamblers. Open every match with a 10-second read: Where is the road? Where is the water? Where will flyers cross?

Boats, barges, and shore synergy

Naval units exist to delete threats that never walk your favorite straightaway. Practical Flood kit pieces:

• Boats for flexible water DPS.
• Rocket Barge for heavy water punch when waves clump offshore.
• Shore MG / PKM / Riflemen to finish anything that lands.
• KPV and related heavy guns where the meta seats them on piers or overlays.
• Economy (Farms, FOB, Signaler) so barge upgrades are not a fantasy.

Place boats where they see the channel for multiple seconds, not on a decorative tile with a one-frame glimpse. Pair each harbor investment with shore cleanup; craft and drowned-style enemies love players who only defend water or only defend asphalt.

Community loadouts often mix one dedicated harbor player with two shore DPS players. In public lobbies, announce “I am boats” in chat so you do not end up with zero water coverage and four Battle Tanks arguing about tile footprints.

Fleet Command and Naval Tokens

Fleet Command is the strategic spend layer on top of static boats. Naval Tokens feed that layer. Critical rules as of v0.25.0:

• Tokens are Hardcore-only.
• On non-Hardcore Flood maps you still need boats and AA, but do not plan your Easy clear around token income.
• On Hardcore Tidefall, track tokens and convert them before the Barnacle Behemoth window.

Outdated guides that farm tokens on Medium are wrong for current patch logic. Always cross-check Patch Notes.

Depth Chargers and submerged pressure

Depth Chargers represent the Flood kit’s underwater threat fantasy—pressure that punishes players who only watch the dirt path. Answers are layered:

• Keep water DPS alive and upgraded.
• Do not sell harbor tiles the moment a road Brute appears.
• Assign one player to call Depth Charger spawns so the harbor lead reacts.
• Maintain enough economy to repair naval assets after a spike.

If your team treats every non-road enemy as “someone else’s problem,” Flood content becomes a series of unexplained leaks. Call the threat type. The Enemies page lists counters for drowned-style units, flyers, armor, and bosses.

Flyers on flooded layouts

Water maps often combine naval stress with flyers. Ground rifles do not magically become AA. Bring:

• Shilka on primary air corridors.
• MANPADS Team on secondary angles.
• Gunships as flex once road and water basics exist.

Flyer waves that overlap landing craft are classic wipe setups on Tidefall. AA lead should upgrade on schedule even when the harbor chat is loudest. Silence from AA is how Behemoth attempts start already doomed.

Event and update mindset

Flood is both a mechanical update and an event-style content push. Play patterns that help:

1. Rehearse Breakwater Port or Flooded Ruins on Medium before Hardcore Tidefall.
2. Rebuild loadouts with at least one naval slot and one AA slot.
3. Watch patch notes when Stage 2 tweaks token rules or map hazards.
4. Use Best Loadouts to lock role kits for harbor, shore, and AA.
5. Keep How to Play skip/speed etiquette so flooded lobbies do not skip mid-placement.

Cosmetics and Halloween Spec Ops can join the fun, but they do not replace a barge or a Shilka when the channel fills.

Economy on water maps

Flood maps are upgrade hungry. Boats, barges, AA, and shore DPS all want coins. Priority suggestion:

1. Early road clear so you do not die before harbor matter.
2. Economy pads down by the time water densifies.
3. Harbor DPS to usable upgrade level.
4. AA to trustworthy level before flyer overlap.
5. Token spends (Hardcore) timed for Fleet Command impact.

Selling every Farm for a single Rocket Barge looks hype and often loses wave 22. Income is a weapon.

Practice route

• Day 1 Flood: Medium Flooded Ruins with boats + Shilka mandatory.
• Day 2: Breakwater Port focusing harbor/shore split.
• Day 3: Tidefall Beach non-Hardcore or easier vote to learn beach geometry.
• Day 4+: Hardcore Tidefall with token plan and Behemoth roles.

Between sessions, skim the tier list because Flood metas shift when barges or AA get tuned. Read Getting Started again if new friends join your lobby—shared basics beat five conflicting “trust me” kits.

Failure patterns unique to Flood

• Road-only loadouts on port maps.
• AA forgotten because chat only talked about boats.
• Tokens misunderstood on non-Hardcore.
• Depth Charger spikes unanswered while everyone upgrades a land tank.
• Wave skip during mass barge placement.
• Assuming Farmland Lake habits transfer 1:1.

Summary

Flood content asks you to defend two planes and often a third in the air. Bring boats and barges, staff AA, protect economy, and treat Fleet Command as a Hardcore spend layer after v0.25.0. Master those habits and Tidefall stops feeling like a random water wipe generator—and starts feeling like a readable, callable defense exam.

When the tide comes in, your harbor better already be awake.