ZombiS 2: God Save The Queen (2012) (X360/PS3/PC)

ZombiS 2: God Save The Queen is a first-person survival horror video game developed by Mojang Dallas and published by Mojang Miami. It was released for the PlayStation 3, Microsoft Windows & the XBOX 360 in February 2012.

Plot
In February 2012, 4 months after the October 2011 Outbreak in L.A, the last vaccine formula named Panacea would be lost, and the player would have had to find a way to retrieve the formula. While in Delaware, the protagonist (if loaded with a save from ZombiS 1) thinks about the last 4 months with horror. If not, he will say that he has tried to be strong. He then enters a boat called "Raven's Nest" from Fenwick Island to London. The very next day after arriving from Delaware, he wakes up to see London abandoned & crawling with Zombies.

Taking shelter from Zombies in an building, he gets a signal from an transceiver in Kensington.