Yeah, it’s basically Space Invaders.
Invaders World Tour features blocks of aliens that need to be shot before they reach the bottom and kill you. It’s about as original as a bald-headed space marine making love to a brooding Japanese man with a huge sword and floppy hair. It’s free though, so who’s complaining?
If you missed it last time, Destroy9 – Alien is free again as well. Since I love the Destroy9 games, I thought I’d mention it.