Invasion Tactical Defense is an impressively complex Flash game where your goal is to protect a nuclear factory from an attacking alien race.
To play, you buy cannons, upgrade the factory, and deploy personnel.
Sounds simple, right?
Well, it’s not.
Thankfully, the game’s designers have added in plenty of settings to tweak and tune as you try to find the right mix, and even then it’s not an easy win, so give it a shot and see what you can do.
The world depends on it.
Caution: The site requires you to register to play, so be prepared to create an account.