Water TD Demo vs Full Game: What You Get for $8.49
Water TD has a separate demo app. What the demo covers, what the full game adds, whether progress carries over, and whether the price is fair for the scope.
Water TD ships with a free demo as a separate Steam app, which is unusual for a small release and useful for anyone unsure about a game whose entire pitch is a physics simulation. Here is what the two downloads actually contain.

The short version
| Demo | Full game | |
|---|---|---|
| Steam app | 5496720 (separate) | 5295330 |
| Price | Free | $8.49 at 15% off, $9.99 list |
| Maps | A slice of the campaign | Every campaign map, plus LAVA and SWARM |
| Skill tree | Limited by what the slice earns | Over 170 upgrades |
| Achievements | Not part of the main 13 | 13 achievements |
| Save transfer | Not stated by the developer | — |
What the demo is for
The demo's job is to answer one question: does watching water erode terrain feel good to you? That is not a rhetorical question. Water TD's core loop is deliberately slower than a wave shooter, and the pleasure comes from reading terrain and watching a plan hold or fail. A demo is the right way to test that.
If you play the demo and find yourself studying the banks instead of the health bar, the full game is for you. If you find yourself waiting for the waves to end, no amount of extra turrets will fix it.
What the full game adds
More terrain vocabulary. The campaign moves through spiral canyons, open archipelagos and circular arenas. Each shape invalidates part of the build you learned on the previous map, which is the actual content of the game.
The full tree. Over 170 upgrades, three currencies and the build diamonds. The demo cannot show you the second layer of the game because the second layer is paid for with CLEAR and PERFECT earned across many levels.
The challenge modes. LAVA and SWARM are applied to every campaign map and gated behind achievements that 0.1% of players have finished.
The achievements. Thirteen, including the hidden ones for losing ten runs and losing a turret to the water.
Whether demo progress carries into the full game is not documented in the store page or the launch news. Steam treats them as separate apps, so assume no transfer and plan to replay the opening.
Is $8.49 fair?
That depends on what you count. The campaign is short by design: each level is one map with one flood, and the developer's post-launch plan mentions balance work and a level editor rather than a content expansion.
What you are buying is a simulation with a small number of maps and a large number of ways to fail them. Players who replay maps for clean clears and challenge modes get more hours than players who play each map once. A Steam discussion thread titled "Game looks great but not for this price" is a fair summary of the other view.
At the launch discount, the risk is a coffee. At full price, the question is whether you enjoy replaying a map until the layout is right. The levels guide→ describes how much variety the maps actually provide.
Demo advice, honestly
Do not use the demo to decide whether you are good at the game. The demo slice is early content with a shallow tree, and the difficulty curve that defines the full game arrives later. Use it to decide whether the water simulation is interesting to watch.
If you already bought the full game, the demo has no purpose beyond curiosity. If you are on the fence, play the demo until you have lost a turret to erosion; that moment is the game in miniature.
The levels guide→ describes the campaign you would be buying, achievements→ lists the long-tail goals, and system requirements→ covers the hardware side.
Frequently Asked Questions
Does Water TD have a demo? Yes. It is a separate Steam app with its own app ID, 5496720.
Does demo progress carry to the full game? The developer has not stated that it does. Steam tracks them as separate apps, so assume no.
Are there achievements in the demo? The 13 achievements counted for Water TD belong to the main app. Demo achievements, if any, are separate.
Is the full game worth it after the demo? If the demo made you watch the terrain rather than the health bar, yes. If it felt slow, the full game is the same idea with more maps.
Sources
Official source: Demo listing and app ID: Water TD demo on Steam ↗ Official source: Full game price and feature list: Water TD ↗ Community source: Player discussion of demo value: Steam community hub ↗

