Merge Mech vs. Zombie Brawl

How can humans survive when a terrifying zombie virus sweeps across the globe?

A terrible zombie virus swept across the world, how can the only remaining humans survive?
At the beginning, you only had one survivor, but luckily this guy's marksmanship is pretty good. Use the remaining vaccines to save more survivors and animals, unite them with you, fight against the zombie army, and ultimately survive. As your troops grow, perhaps you can acquire tanks, planes, and even various mechs!
How to play the game
Get partners
Defeat animals infected with viruses, treat them with vaccines, and make them our partners
Merge survivors
Enable them to gain stronger power, unlock mechas, planes, and tanks
Defeat the opponent
You will encounter various zombies, virus-infected animals, and the mastermind behind the scenes - Dr. Zombie