Keeper of the Grove 3

Keeper of the Grove 3 changes what losing a wave means. The creeps walking your path are not trying to destroy anything; they are trying to pick up a gem and carry it off the map, which gives you a second chance the genre usually does not.

That second chance reshapes where towers belong. A thief that reaches the gems still has to walk all the way back, so towers covering the return route are doing real work, and a path that doubles back on itself is worth far more than a straight one of the same length.

Towers differ in what they are good against rather than in how much they hit for, and upgrading one properly usually beats building a fourth. Money is tight enough that the choice comes up every wave and rarely feels obvious. It does not arrive on its own either: coins drop onto the map and have to be picked up one at a time.

Spells sit on top as the answer to the wave you misread, and they recharge instead of running out. Saving one for a wave that never arrives is the mistake that costs a map, so spending them slightly early is the safer habit. The button in the top left corner also calls the next wave in early, and that nerve is paid for with a bonus.