Zombie Attack Whitehouse

Civilization is on the verge of collapse as a zombie pandemic rapidly spreads across the globe.
You must protect the President from waves of zombies and get him to Air Force One. The fate of the world rests on your shoulders.
Use your skills as an elite member of the Secret Service, Counter Assault Team (CAT). A special forces unit within the Whitehouse that provides tactical support to protect the President of the United States.
Use a collection of weapons including Glock 9mm, M4 assault rifle, Heckler & Koch UMP,
M240 general-purpose machine gun,
SAR-B16 Bullpup Assault Rifle, Franchi SPAS-12 semi-automatic shotgun, Heckler & Koch MG36 light machine gun, AWM bolt action sniper rifle, and the Remington Concealable Sniper Rifle.
You have a successful career protecting recent presidents Barack Obama,
Donald Trump, and Joe Biden. The Secret Service has not lost a President since John F Kennedy. We will not lose one on your watch.
Zombie Attack Whitehouse is a first-person shooter (FPS). Your mission is to protect the President at all costs using a collection of weapons and explosives.