Deep space, tower defense, big explosions, lots of different alien ships, multiple ways of gameplay. Try to defend human space station from incoming alien horde.
Astrobase Defense is not ordinary TD game. Instead of just mindless tower spam you need to think carefully where exactly to put towers because when one is placed you wont be able to put another in its range. Moreover the type of the tower is matter a lot. More expensive does not always mean – the best. Its a little bit hardcore but that was the idea.