1. BEGINNING Things have only just begun. Can you get ahead of the problem or are things just going to go to shit?
2. MIDDLE Things HAVE gone to shit. You're right in the middle of things and there's no end in sight. You have to do your best just to get to tomorrow.
3. END Things are finally winding down (or amping up getting ready to wind down). You're in preparations for the final battle, you're killing off the last few zombies, you're living your life.
4. REBUILD/DESPAIR Things are OVER. Either you won or you lost, time to rebuild or go down in your bunker and cry. Hold onto your asses, folks.
1. MONSTERS/KAIJU Think Godzilla or Pacific Rim. There are monsters, huge ones, and you gotta go through some shit to keep them from killing everything and busting up that last Dunkin Donuts you go to every Thursday with the cute girl working the counter. This is an outrage!!
2. ZOMBIES You know the drill. Whether fast or slow, virus or reanimated, airborne or fluid-borne, biting or eating: your favorite thing, zombies. Remember to aim for the head.
3. ALIENS Visitors from space! ... Except they're killing all of you! Does anyone you know have a cold? Send them to the front lines.
4. WAR Everything's gone to hell. It's going to become a nuclear winter out there if someone doesn't stop the tide of this war. History won't be written by the victors because there won't BE any.
5. "UTOPIA" Everyone is happy, right? Things are so much better now that we don't have any emotions, right? When we started culling populations to keep enough supplies for everyone, right?
6. ROBOTS YOU DID THIS TO YOURSELVES. YIKES. Skynet is a thing, everything is terrible, you're gonna get owned by a Reaper, whatever. Take 'em out, cowboy.
7. DISEASE You're not turning into rabid monsters, but people are dying off at alarming rates. What's causing it? Is there a cure? Is anyone immune? Figure it out, boyo.
8. MISC Anything left over!! Killer tomatoes? World taken over by talking dogs in exoskeletons? Whatever man, we're not the cops. Have fun.
As always, these are just suggestions. Make up anything you want, as long as you're having fun!