Samsung Galaxy S4 — Can't find a specific game.

I was playing Robot Unicorn Attack 2 and decided to watch a video ad for in-game currency. The ad was for a game with "Invasion" in the title. I didn't quite see the full name, as it flashed too fast for me to see it all. When the ad was over, my screen went black and the ad was gone. I've searched the Play Store multiple times for games with "Invasion" in their titles. I've also tried Google Search. Nothing. I can't find the game. I really wanted to download it and if anybody knows exactly what I'm talking about and can tell me the name of the game, it would be greatly appreciated. Please and thank you.