A tower defence game that's also a bit based on luck. Place 5 gems each round, you can only keep one. Upgrade the chance to find better gems and upgrade or combine your gems to get better. Original...

Robots are invading! Protect the tree of life in this side-scrolling tower defense brawler by building up defenses or bashing them to bits the old-fashioned way.

Build and upgrade your mushrooms to defend the farm. A nice and pretty world, scroll through the map with the mouse. Towers are pretty basic but do have some upgrades. Also a useful minimap.

War in the backyard. Be the commander of a small army of ants and other insects, build your base and defense to keep the enemy away and crush them. Very nice strategy game with some good features.

Instead of defending, this time you need to attack towers, while you're the unit. Sounds like AntiTD but is way bigger and better. Somehow this game doesn't work for everyone, sorry.

A large tower and turret defense game. Build and upgrade towers and train units to fight the incoming enemies.