Stop The Tsunami Co-op Strategy Guide

Co-op is where Stop The Tsunami! opens up. Friends share one coin wallet and every machine, so one player can dig while another drives a bulldozer and a third patches mid-wave. That shared economy is a force multiplier when you coordinate — and a drama generator when everyone buys the same shovel and fights over the only excavator. This guide covers shared-wallet strategy, digger / driver / patcher roles, communication, and Medium / Hard team tips. Pair it with the Players Hub, Upgrade Machines, Build Defenses, and the Tier List Hub.

How shared progress works

• One coin wallet funds the whole squad’s upgrades.
• Every machine is available to the team — treat the fleet as communal.
• Held waves pay the shared purse; wipes tax everyone’s time.
• Roles matter more than hero stats: throughput and packing win rounds.

Before the first dig, agree on who spends coins and who crews which seat. Silent shopping is how dump trucks appear while nobody owns a shovel.

Role triad: digger, driver, patcher

Digger

Owns raw volume. Starts on shovel, moves to excavator when beaches widen. Digs toward the planned wall line, not random art pits. Calls “fed” or “starving” so drivers know whether to haul or wait.

Digger goals

• Keep material flowing without undercutting the foundation.
• Prioritize flanks when the wall is already tall in the center.
• Stop digging decorative holes once START ROUND is imminent.

Driver

Crews bulldozer, skid steer, or dump truck. Pushes piles into a continuous berm, grades crests, and hauls bulk from rich dig sites to hungry flanks. On widened beaches the driver is the difference between a local dune and a full-span wall.

Driver goals

• Never park on the crest that still needs packing.
• Answer patcher callouts with material, not vibes.
• Swap to dump truck logistics when distance beats dig rate.

Patcher

Lives on the wall face. Packs before START ROUND, then seals breaches during the wave. In a two-player duo the patcher may also help pack; in a trio the patcher should stay visual on wet spots.

Patcher goals

• Continuity and packing checklist before anyone hits START ROUND.
• First priority mid-wave: active leaks, not vanity height.
• Clear callouts: “leak left flank,” “overtop center,” “need gravel here.”

Solo players can still think in these roles by rotating phases. Duos often merge digger+driver while one stays patch-focused. Trios should lock the triad.

Shared wallet strategy

Spend like a team, not like three solos stuck in one lobby.

1. Shovel first for whoever digs — toy spades are not a personality.
2. One bulldozer or skid steer before duplicate light tools.
3. Excavator + dump truck when stages widen the beach.
4. Material budget for Medium / Hard instead of a fourth cosmetic digger.
5. Recheck the Tier List Hub and Upgrade Machines after payouts.

Appoint a spender. One voice confirms buys. Arguments mid-dig cost more than the machine.

Avoid clone fleets. Three skid steers and no haul truck is a meme, not a plan.

Communication that saves walls

Use short callouts:

• “Gap right” / “soft crest mid”
• “Truck empty” / “excavator idle”
• “Packing now — no START”
• “START on my mark” / “START aborted”
• “Rewind?” / “Rewind yes — rebuild flanks”

Agree who presses START ROUND. Nothing ends friendships faster than a premature start while a flank is still open. The patcher or designated lead should own the button.

Voice helps; typed macros work if everyone watches chat. Silence is how leaks grow.

Easy co-op — learn the dance

On Easy, practice role swaps without Hard materials. Build a continuous packed wall using digger / driver / patcher habits. Treat Easy as rehearsal for callouts and START ROUND discipline. Claim Beach Club Rewind before experimental team drills so a bad start is a lesson, not a logout.

Medium co-op tips

• Expect longer walls; driver value spikes.
• Start assigning a dedicated patcher before the wave.
• Buy the next machine when shovel cycles cannot finish length in time.
• Review Build Defenses as a group if the same flank fails twice.
• Keep daily rewards and any codes claimed so the shared wallet starts healthier.

Hard co-op tips

• Bring gravel, boulders, clay, concrete into the staged plan.
• Lock excavator and dump truck seats early.
• Patcher calls material spends mid-wave.
• Rewind only with a rebuild plan spoken out loud.
• Read Hard Mode together before the grind night.

Hard co-op fails when three people dig the center and nobody watches the edge. Roles beat raw player count.

Pre-round team checklist

1. Lobby: dailies, Beach Club Rewind, codes check.
2. Difficulty agreed (Easy / Medium / Hard).
3. Roles assigned and machines claimed.
4. Spender named for the shared wallet.
5. Wall endpoints marked for current beach width.
6. Dig → pile → trench → pack complete.
7. Patcher confirms no gaps.
8. Lead calls START ROUND.
9. Eyes on flanks as water arrives.
10. Post-round: note failure point, adjust buys or roles.

Drama and anti-patterns

Wallet sniping. Buying a vanity machine without discussion.

Seat camping. AFK in the only dump truck.

Start sniping. Pressing START ROUND without patcher OK.

Spectator squad. Everyone watches the leak; nobody patches.

Blame ping-pong. Fix the flank, then talk. The tsunami does not care who was “right.”

Related reading

• Player systems and controls → Players Hub
• Fleet shopping → Upgrade Machines
• Wall craft → Build Defenses
• Rankings → Tier List Hub

Co-op turns Stop The Tsunami into a tiny construction crew with a shared bank account. Assign digger, driver, and patcher, spend the wallet on coverage, and only start the round when the line is packed. Do that, and wider beaches feel like a bigger canvas instead of a bigger wipe.