Invaders

Invaders is a card-based alien defense game. When in-game, humans will move across the bottom of the screen, while aliens will fire at them. Once all humans die, the game ends. To defend them, the player can directly attack aliens (by hovering the mouse over an alien), build towers that will automatically fire on aliens, or use cards to perform various actions such as summoning more humans or damaging aliens. After enough time in a level, a boss alien will appear. After defeating it, the player can select an area to go to next.

Between games, the Hub can be accessed. Here, the card deck can be customized, and various upgrades can be purchased, such as increasing the damage caused by the mouse, or decreasing the card summoning time. More features can be unlocked by leveling up.