Water TD Upgrade Points: How to Earn and Spend Them
What Water TD upgrade points are, how BASIC, CLEAR and PERFECT differ, and a spending order that gets you through the campaign without wasting currency.
Water TD does not give you a tech tree per level. It gives you a single global tree and three separate pools of points, and the way you spend those pools determines whether the campaign gets easier or harder as it goes.
The three pools
BASIC is the workhorse. It buys ranks in ordinary nodes: turret damage, range, base health, support upgrades. You earn it steadily by playing, and the tree's BASIC prices run from 110 to 3,014.
CLEAR is the completion currency. It buys the ▲1 and ▲2 build diamonds, which change how a turret fights.
PERFECT is the mastery currency. It buys the ★1 and ★2 diamonds, which are usually the premium or second build on a turret. You earn it by clearing levels without letting the base take a hit.
The important design choice is that these do not convert. You cannot trade ten BASIC for one CLEAR. That means a player who clears sloppily will always lack the behaviours that make late levels manageable, no matter how many BASIC ranks they own.
How each pool is earned
- BASIC accumulates from normal play and from level completion.
- CLEAR is awarded for clearing a level, which is why the skill tree counter shows a small number relative to BASIC.
- PERFECT is awarded for clean clears. On the launch-build tree screenshot the counters read BASIC 60, CLEAR 3, PERFECT 0, which is a snapshot of a player who has finished a few levels but has not yet chased a flawless run.
Untouchable, for winning a level without the base taking a hit, has a 91.7% global unlock rate, which means most players get their first clean clear without trying. If you need PERFECT currency, replay an early map with a deliberate defensive layout rather than pushing forward.
The spending order that works
Phase 1 — coverage. Two ranks of AUTO damage and one or two ranks in BASE health. This is the cheapest way to make every level easier.
Phase 2 — insurance. Unlock FLAME and put one rank in it. The water that ends runs is the water that reaches your line, and FLAME is the family built for that case.
Phase 3 — behaviour. Buy your first ▲1 build diamond on the turret you place most. This is the point where the game's second layer opens up.
Phase 4 — answer the map. Add the turret family that solves the map shape you keep losing to: TESLA for wide fronts, LASER for deep channels, MORTAR for water you cannot see.
Phase 5 — luxury. Ability upgrades, premium diamonds, the 3,014 BASIC tail. This is for a save that has already beaten the campaign.
What not to spend on
Rank-one everything. Six rank-one nodes are worse than two rank-three nodes for the same price, because ranks compound within a node.
Premium diamonds you cannot use. A ★2 MORTAR diamond is dead currency if MORTAR is not in your build.
Range before damage. Range lets a turret reach water it cannot kill. Damage first, range when the map demands it.
Ability unlocks before your first diamond. Abilities are situational; a build diamond improves every level the turret appears in.
When to replay instead of pushing
If a level fails twice with the same layout, the problem is usually the build, not the skill. Replaying an earlier map with a new turret or a new diamond is faster than grinding a wall, and it also earns CLEAR that you can spend on the next behaviour.
The skill tree guide→ shows where each node sits, and the builds guide→ explains what the diamonds actually change.
The skill tree→ shows where points go, builds→ explains the diamond costs, and achievements→ is the checklist for earning more.
Frequently Asked Questions
Do upgrade points carry between levels? Yes. The tree is global and points earned anywhere can be spent on it.
Can I lose points by failing a level? No. Failing costs time. Points already earned stay.
How do I get PERFECT points fast? Replay an early level with a layered defence and keep the base untouched. Clean clears are the only source.
Is there a point cap? None is documented. The limiting factor is the cost of the nodes, not a maximum balance.
Do challenges give points too? Challenges are modifiers on existing maps. They are covered in the challenges guide→, including whether they are worth farming for currency.
Sources
Official source: Upgrade and currency overview: Water TD on Steam ↗ Community source: Achievement unlock rates used for the PERFECT advice: Steam stats ↗ Official source: Patch notes affecting costs: Water TD news hub ↗