- Stop The Tsunami blocks list: Every material from wood to obsidian, ranked by defense.
- Material luck matters: Tsunami types are drawn between rounds, and so are your build materials.
- Obsidian is the top pick: It shrugs off blood moon tsunamis with minimal wall damage.
- Wood is the weakest: Front-row wood blocks shatter instantly against mega tsunamis.
- Rarer blocks pay more: Placing rare materials earns extra cash for gym and booth upgrades.
Stop The Tsunami Blocks List Overview
In Stop The Tsunami, your survival depends on the blocks you stack between waves. Each round begins with a draw that determines both the incoming tsunami type and the material pool you can build from, so knowing how every block performs is the difference between a shattered wall and a clean survival.
Between rounds the game makes you draw for the next tsunami, and in many rounds you also draw your building material. A lucky obsidian pull against a lava tsunami is close to a free win; a wood pull against a mega tsunami demands thick, layered walls.
Here is the full blocks list with in-game performance notes:
| Block | Durability Tier | Best Used Against | Notes |
|---|---|---|---|
| Wood | ★☆☆☆☆ | Normal tsunami only | Front rows shatter instantly vs mega tsunami |
| Sand | ★★☆☆☆ | Emergency filler | Risky vs lava; melts into glass and traps careless players |
| Standard brick | ★★★☆☆ | Normal, mega | Reliable all-rounder for patching weak spots |
| Emerald | ★★★★☆ | Mega, blood moon | High defense and strong cash payout per placement |
| Obsidian | ★★★★★ | Blood moon, lava, rainbow | Best block in the game; sheds waves with minor surface damage |
Block Rankings by Tsunami Type
Different tsunamis punish different materials. Match your block choice to the wave you drew for the best result.
Wood
- Weakest block in the game
- Front row breaks instantly vs mega waves
- Still earns placement cash early on
- Use only when no better option is drawn
Sand
- Emergency filler material
- Can technically block lava tsunamis
- Melts into glass on contact, blocking sightlines
- Build thick to compensate for low durability
Obsidian
- Best block available
- Barely scratched by blood moon waves
- Tears only a thin layer vs lava
- Stack continuously for both defense and income
| Tsunami Type | Difficulty | Recommended Response |
|---|---|---|
| Normal | Low | Any material, single-thickness wall works |
| Mega | High | Brick or better; layer the front row deeply |
| Blood Moon | Epic | Emerald or obsidian; reinforce thin sections mid-wave |
| Rainbow | Very High | Obsidian preferred; highest known tier |
| Lava | High | Sand in bulk or obsidian; watch the flanking flow around wall edges |
Even a wall that survives impact can leak. Lava and rainbow tsunamis flow around the sides of defenses, so never leave gaps at the map edges, and avoid standing near the flanks when impact hits.
Step-by-Step: Building a Winning Wall
Follow this routine every round to get the most out of whatever blocks you drew.
Check the Draw
Read the tsunami type and your material pool. Plan wall thickness based on how aggressive the wave is; mega and rainbow rounds demand much more depth than normal rounds.
Train at the Gym
Use the treadmill and weights before collecting. Leg speed shortens your trips and arm strength raises how many blocks you can carry at once, up to a much higher cap.
Grab Blocks in Bulk
Fill your carry limit at the block pool every trip. Once you have cash, buy the bulk pickup and bulk placement upgrades at the booth so each trip moves far more material.
Build and Patch
Place blocks on weak sections first, especially low spots and the right-side flank. Do not just stack straight up; height alone will not save you from a tall wave.
Reinvest and Repeat
Every block placed earns money, so keep laying blocks even when the wall looks solid. Spend earnings on speed multipliers and carry upgrades for the next round.
You earn cash for placing blocks, not just surviving. Rare blocks pay more per placement, so high-tier rounds are also your best money-making rounds when you keep stacking.
Upgrades That Boost Your Blocks
Gym training and booth upgrades directly multiply how effective your wall-building is each round.
| Upgrade | Effect | Value |
|---|---|---|
| Gym treadmill | Raises movement speed, faster block runs | Free tier available |
| Gym weights | Raises carry capacity for blocks | Scales with training points |
| Speed multiplier (5x) | Faster runs for a small Robux cost | Cheap, high value |
| Strength multiplier (10x) | Large carry boost | Pricier, optional |
| Bulk pickup | Collect multiple blocks per grab | Top priority |
| Bulk placement | Place multiple blocks at once | Top priority |
| Placement range | Wider placement reach | Lower priority |
The diamond treadmill can push your strength to very high levels without spending Robux. Paid multipliers are convenience, not a requirement; consistent training and bulk upgrades carry most runs.
Every tsunami type you survive also unlocks an entry in the in-game gallery, which doubles as your progression tracker for the 10x multiplier milestone after facing five different waves.
Survival Checklist
Every-Round Checklist:
- Draw the tsunami and check the material pool
- Train leg speed and arm strength at the gym
- Buy bulk pickup and bulk placement upgrades
- Patch low spots and flank gaps before impact
- Keep placing blocks until the wave hits for extra cash
FAQ
Q: What is the best block in Stop The Tsunami?
Obsidian is widely considered the best block in the game. It takes only minor surface damage from blood moon tsunamis and sheds lava waves with just a thin outer layer peeled away.
Q: Can wood blocks stop a mega tsunami?
Not reliably. Wood is the weakest block in the Stop The Tsunami blocks list, and front-row wood blocks shatter instantly against a mega tsunami. Build multiple thick layers if wood is your only option.
Q: Can sand really block a lava tsunami?
Yes, but it is risky. Sand can hold back lava when stacked in a thick wall, though the surface melts into glass. Never stand at the wall edges, because lava flows around the sides of defenses.
Q: How do I carry more blocks?
Train arm strength at the gym, use the diamond treadmill for free stat gains, or buy the 5x speed and 10x strength multipliers. The bulk pickup upgrade at the booth also lets you grab several blocks per interaction.