In addition to swapping Galaga's ships out with Tekken characters, this crossover also employ's Tekken Tag's mechanic of allowing you to call in addition fighters to deal extra damage alongside you.
“With Galaga: Tekken 20TH Anniversary Edition, we wanted to give our fans something unexpected to celebrate such a huge milestone for Tekken. The crossover gameplay is sure to surprise and delight bothTEKKEN and Galaga fans," said Tekken series chief producer and director Katsuhiro Harada.
ORIGINAL STORY 27/04/2015 5.12pm The Tekken / Galaga crossover we reported on for April Fools' Day has turned out to be an actual product, albeit only in Japan.
Celebrating two decades of Tekken, the crossover is basically Galaga with the ships replaced by 8-bit sprites of Tekken characters. There's also a Pac-Man cameo. Can we now say these all exist in the same universe now?
Galaga Tekken 20th Anniversary Edition looks a little something like this: