Resident Evil Series

Resident Evil, follows the story of a viral weapon that has leaked (the T Virus) and is spreading, the infection causes people who should have died to become the undead, and feast on others.  The Umbrella Corp, who built and experimented with the virus, need to be brought down, and as the virus wipes out the world, they just keep experimenting, not caring who gets killed.  The heroine Alice (who becomes half mutant) is trying to stop Umbrella Corp, with the help of any survivors that she meets.  Film one, is the initial outbreak of the virus in one of the Umbrella Corps bases, by film two its spread to the local town, Film three - the world, and film four (the final showdown), is dealing with the infection as it is still spreading and mutating.

Narcissa and the valley of the wind - Studio Ghibli

One of the studios first films in 1984, portraying environmental and post apocalyptic undertones. The story is based on a toxic world, polluted by humans. Most of the world in is ruin, taken over by the Sea of Decay, toxic plant life which kill when breathed in.  The only survivors are a few scattered villages and some insects (terrifyingly large ones).  Narcissa is the princess of the Valley of the Wind try's to save the world by working with the insects and the toxic plants.  However in a typical good vs evil plot their are those who want to 'save the world' by burning it and starting again.  A war breaks out over competing villages both who believe they are doing the right thing to stop the Sea of Decay spreading.