WMS made the slot back in 2013 and were later bought by SG Scientific Games in 2016. The evidence is there, but does the game come in peace? Enough with the dramatics and into the nitty-gritty parts of the game. Step into our collection of free online slot games and you will witness the Invaders from the Planet Moolah. Hold on to your loved ones and farm animals those pesky aliens are at it again.