- Stop The Tsunami is a wave-defense game where you dig, stack, and reinforce barriers before each tsunami hits.
- Core loop: stop waves, earn cash, buy better tools, face bigger waves across new zones.
- Tool progression: shovel, sand trencher, bulldozer, mini excavator, large excavator, dump truck, wall tools, cement truck.
- Best materials: gravel dumped by the truck offers more stabilization than loose sand.
- Key tactic: dig trenches in front of walls so water drops and loses momentum before impact.
Gameplay Basics: How the Wave Cycle Works
Stop The Tsunami follows a simple but escalating rhythm. Each round, you receive a warning that waves are approaching, giving you limited preparation time to build walls, dig trenches, and position barriers between the ocean and the town. Every successfully blocked wave pays out cash, which funds better equipment for the next, larger set of waves.
Early rounds typically send a small number of modest waves, while later rounds combine multiple large waves with expanded coverage zones that force you to defend more territory at once.
| Round Phase | Wave Count | Threat Level | Reward |
|---|---|---|---|
| Early | 1-3 small waves | Low | Small cash per wave |
| Mid | 3+ medium waves | Moderate | Cash plus tool unlocks |
| Late | Multiple huge waves | High | Large payouts, new zones |
When the ocean pulls back dramatically, a significantly larger wave is coming. Use that cue to drop whatever you are doing and perform emergency digging on your weakest wall section.
Tool Progression and What to Buy First
Your toolkit starts with a plastic bucket and shovel, which can only handle the smallest waves. Cash from blocked waves unlocks progressively heavier machinery. Each machine changes how efficiently you move sand and build defenses, so spending in the right order saves significant time.
| Tool | Unlock Cost Tier | Strengths | Weaknesses |
|---|---|---|---|
| Bucket & Shovel | Starter | Free, precise digging | Extremely slow |
| Sand Trencher | Low | Fast trench digging | Limited wall building |
| Lifeguard ATV | Low | Quick map travel | Hard to control, no digging |
| Big Shovel | Low-Mid | Better manual digging | Still hand-built walls |
| Bulldozer | Mid | Pushes sand into large drifts | Awkward on slopes |
| Mini Excavator | Mid-High | Faster digging, reinforces walls | Tricky to maneuver |
| Large Excavator | High | Grabs huge sand amounts, slow but powerful | Very slow travel |
| Dump Truck | High | Hauls rock and gravel from the cove | Only 4 boulders per trip |
Early Game Plan
- Buy the sand trencher first
- Dig trenches ahead of walls
- Save cash for the bulldozer
Mid Game Plan
- Prioritize the excavator line
- Reinforce wall thickness, not just height
- Unlock the workshop cove zone
Late Game Plan
- Dump truck plus gravel
- Layer rock piles in front of sand walls
- Reserve cement for critical gaps
Do not spend excessive time hauling boulders with the dump truck. At only four boulders per load, gravel is the more efficient stabilization material for covering long stretches of coastline.
Step-by-Step: Building a Dam That Holds
The most reliable defense in Stop The Tsunami combines three elements: a trench that forces water to drop, a thick primary wall, and a secondary backup wall behind it. Follow this sequence each round.
Scout the Wave Path
Identify exactly where the tsunami enters, often through a narrow port or inlet. Concentrating your defenses on the actual entry point saves enormous effort compared to walling the entire beach.
Dig a Forward Trench
Use the sand trencher to carve a deep channel in front of your planned wall. Water dropping into the trench loses momentum and height before reaching your barrier.
Build the Primary Wall
Push or excavate sand into a wide, thick mound. Thickness matters more than height, because thin walls get washed through even when tall enough on paper.
Add a Backup Wall
Construct a second, smaller wall behind the first. If the primary barrier is breached or splashed over, the backup catches the remaining surge and keeps the town dry.
Reinforce with Gravel
Once the dump truck is available, spread gravel and rock along the front face of the primary wall for extra stabilization, then send the wave.
If a wave is already incoming and a section looks weak, rapid emergency digging directly in front of the wall can still save the round. Dropping the seabed lower forces water to fill the pit first, buying your wall precious seconds.
Advanced Tactics and Zone Coverage
Advanced Techniques:
- Dig trenches on both flanks so water dips before reaching walls
- Use the excavator sideways while stationary to dig without repositioning
- Park in the trench and dig again to raise and strengthen the wall
- Spray glue on flattened sand for extra cohesion before waves
- Cover newly unlocked zones before starting the next round
Later rounds dramatically expand the area you must defend, and unlocking zones like the workshop cove means your old defenses no longer cover everything. The water level also rises relative to your walls, so a barrier that held earlier rounds can be splashed straight over later.
| Tactic | Best Tool | Effect |
|---|---|---|
| Forward trench | Sand trencher | Water drops and slows before impact |
| Wall thickening | Large excavator | Resists sustained wave pressure |
| Gravel fronting | Dump truck | Stabilizes sand against erosion |
| Multi-wall layering | Any | Backup catches overflow |
| Inlet focusing | Observation | Defend only the entry channel |
When a new zone unlocks, broad coverage with decent walls beats a perfect wall in one spot. Waves exploit any dry gap you leave undefended, and one flooded street can cost the round even if the rest of the town survives.
Farming Cash and Efficiency Tips
Cash income scales with each successfully stopped wave, so consistency across many rounds outperforms risky all-in defenses. Reinvest earnings immediately into machines rather than hoarding, because better tools compound your building speed for every future round.
| Strategy | Cash Outcome | Risk Level |
|---|---|---|
| Conservative multi-wall defense | Steady income every round | Low |
| Minimal wall, emergency digging | Fast rounds, occasional floods | High |
| Full gravel fortification | Expensive but very reliable | Low after setup |
Money sitting unused earns nothing. The large excavator in particular transforms your building speed, and players who delay buying it often realize they could have owned it much earlier and saved long stretches of manual digging.
FAQ
Q: What is the best first tool upgrade in Stop The Tsunami?
The sand trencher is the strongest early purchase. Trenches reduce wave momentum before impact, letting even simple sand walls hold against waves that would otherwise wash them away.
Q: Should I haul boulders or gravel with the dump truck?
Gravel is generally the better choice. The truck only carries four boulders per trip, making boulder runs extremely slow, while gravel loads let you stabilize long stretches of wall quickly.
Q: Why does my wall fail even when it looks tall enough?
Water can splash over the top or erode thin sections. Focus on thickness rather than height, add a backup wall behind the primary barrier, and dig a forward trench so the wave drops and loses energy first.
Q: How do I defend new zones that unlock later?
When zones like the workshop cove open, your old defenses no longer cover the full coastline. Pause before starting the next round and spread coverage across every entry point, prioritizing the inlets where waves actually arrive.