Keeper of the Grove
Like gems? Yeah, well so do the big bad uglies coming up the garden path. And, not to point fingers, but someone forgot to close the gate. Luckily, in Keeper of the Grove, a ferociously cute new tower defense game from Booblyc, you'll have a whole cornucopia of plants, rocks, and water elementals to throw at 'em.
You have three choices of base towers. Sprouts are cheap, but fast and can shoot far away. Aqua towers are more expensive, but worth every penny in upgrades to slow the creep onslaught. Most expensive and powerful are rock towers, but you'll have to wait awhile before you can upgrade these bad boys. After a few levels, you'll unlock the ability to research better towers, which you'll have to do again at each new map. Sounds simple, right? Not even close. From these three base towers you can research 9 more, creating a lot of strategic possibilities with a load of replay value. But, without a doubt, your best weapon is the [spacebar], which puts the game in slow-mo and gives your addled nerves a breather.
Don't be fooled by Keeper of the Grove's Sunday afternoon Candyland exterior; underneath all that cute lies a monster of a tower defense game that will keep you up at nights... unless you remember to choose Normal difficulty on the opening screen, which is what you'll want to do if you are just looking for a nice walk in the park.