Dead Block

This is the only difficult trophy to obtain. You’re required to obtain all the gold medals in every level of the game. To win gold medals you must play the game on hard to obtain the gold medals. Each level requires you to do the following in full:

Destroy Objects: Destroy certain number of furniture for that level
Search Objects: Search number of searchable objects for that level
Kill Zombies: Kill required amount of zombies or over the required amount for that level
Number of Deaths: Cleared a level without dying for that level (includes AI party members not dying as well)

This trophy will take the most of your time since it’s harder to build up blockades and zombies are stronger and while you are weaker with slower health regeneration. While going for this trophy I suggest that you destroy and search through objects first because the more items and supplies you have for building traps will help aid you. The best characters in the game are both Mike Bacon and Foxy Jones who both also have fast searches (Mike searches slightly faster than Foxy). Mike has the Toilet and Cardboard Traps that can cause zombies to attack and kill each other. Although Mike’s Cardboard Trap is more effective to use because the zombies will have boxes over their heads and will wonder around and leave you alone while you’re destroying and searching objects. Foxy Jones is the strongest character in the game in terms of melee strength and she has the best trap called the Bomb Trap, which can kill a lot of zombies at once to reduce the amount of zombies you’ll need to kill left.
 

Medal Seeker Survival Tips:

1. Jack Frost: He’s not really the best character to use for doing the gold medals, however, he has the best blockade building traps in the whole game. His best trap is the Concrete Blockade Trap which can stop zombies from coming in from a door or window completely. So use Jack to put up his Concrete Blockade Trap in places where a lot of zombies will come from or use it to protect your characters from dying by stealing them in a room with his Concrete Blockade Trap
2. Mike Bacon: Mike is one of the best characters to use in the game for doing the gold medals. Use his Cardboard Trap to put boxes on zombie’s heads and they won’t attack you at all but will attack other zombies adding more zombie kills to your count meter. Also be sure to use his special smartbomb attack by pressing to throw a cheeseburger so zombies can be distracted by its smell. Eventually his smartbomb will become upgraded to have a dynamite bomb in the cheeseburger to kill multiple zombies distracted by it.
3. Foxy Jones: Foxy is one of the best characters to use in the game for doing the gold medals. Use her Bomb Trap for it’s the best trap in the entire game and has incredible destruction power to destroy every zombie near it. Also be sure to use her smartbomb ability by pressing to kill zombies that get in your way. Eventually her taser gun will be upgraded to a revolver and a shotgun which can kill 6-12 zombies at once.
4. Searching objects: Use only Mike or Foxy while playing through the levels for the gold medals because these two have the best searching abilities and can get the job and objectives done much faster. Never use Jack to search because he has the slowest searching abilities.
5. Put up wood blockades: Blockade all the windows and doors within a room that you’re working on. This helps you stall for time while you’re destroying and searching objects. Also let the AI keep the wooden blockades up and running properly if you’re with a party. Once you collected all the items within a room that you’ve worked on in full, then breakdown and remove your blockades to get back your wooden supplies and move towards another room and repeat the putting up wood blockades process (If you had AI with you in the room manually move them with you).
6. Useable items: While searching through objects you'll find useful useable items such as coins, Jukebox, soda machines, meat, and TV antennas. Use these items to help aid you against the undead especially the TV antennas because they help you clear a room for no zombies will bother to attack you if there's a TV in the room with an antenna.
7. Survive the mayhem: For every level you must not die at all which includes your party members not dying as well. It’s best to try and do this last if you can for a gold medal. You don’t want to have to destroy or kill all the zombies all over again. Once you earned a gold medal you’ll have that medal forever only if you cleared a level, so attempt this gold medal last as a speed run. All you have to do is get to that guitar and play it as fast as possible by using Mike or Foxy to search through objects only looking for the guitar parts. I also suggest that you seal up party members in a safe room so zombies won’t kill them if you’re not using them.