There are a total of 5 side missions that are all on the road map. The name, where they're located, and what they are; is located below.
- Snack Attack - South of Mission 4.
Collect 8 food items around the market.
- Expiration Dates - South of Mission 5.
Find the Twinkies.
- Style Points - North of Mission 6.
Kill 3 waves of 150 zombies (450 total kills).
- Quantity is Job #1 - South of Mission 7.
Kill 500 zombies.
- High School Reunion - North of Mission 8.
Get to the gymnasium and kill the boss.
Don't know what the dislike is for, but if something is missing, please leave it in the comments and I'll update. Thanks!