Dead Rising 4

To my surprise, I got this achievement well before I got the 51 unique combo weapons trial in the single player game. With some experimentation, I think I've sussed out the requirements for this solution.

For the achievement: You need to create 58 unique weapons from a combination of the 51 you can make in the single player, the 3 multi-player healing weapons (which you can only create in multi-player) and the 12 gold combo weapons. Combo Vehicles do NOT count.

Here is an alphabetical checklist of the weapons available in the single player game. Unless otherwise noted, it is created using the blueprint of the same name.



The following are the three healing weapons you can only make in the multi-player portion of the game, and are unlocked by performing multi-player trials.



The following are the twelve Gold Combo Weapons you make by combining the "base" combo item with a gold bar. Like the multi-player healing weapons, the blueprints are earned through multiplayer trials:



Common issues and misconceptions:

-- The DIY Grenade and Santa Trap blueprints create three weapons each -- an acid type when combined with chemicals (ex household chemicals), a fire type when combined with flammables (ex. gasoline cannister), and an ice type when combined with cryo (ex. liquid nitrogen). Each type counts toward both the 58 unique weapons achievement and the 51 unique weapons trial.

-- Unlike the DIY Grenade and the Santa Trap, Blast from the Past only has one "type" (explosive). There are rumors out there to the contrary, but I've found these rumors to be false.

-- Again, vehicle combos do NOT count for this achievement.

-- Gold bars are found on counters of random shops during your New Game+ (assuming you completed chapter 6 of the game). You can also find them randomly in multiplayer or (much easier) buy them for the vending machines in multi-player for 3000 scrap (2400 with discount)

-- Almost all of the ingredients needed to make these items can be found with one of the four Weapon Vendors in the four emergency shelters on the map (the most commonly asked about item, the microscope, can be found from the vendor in the north district. I believe the flare gun can be found in the west district, correct me if I'm wrong on the latter). If you don't see something at one vendor, try the next three. The few items you won't find at the vendors, like the toys and masks, should be easily found at an appropriate shop/area (i.e. toy store for the masks, Christmas Village in the mall for Christmas items, etc)

-- Be aware when using the 51 weapons trial as a counter for this achievement, as it will tick up once when the first gold combo weapon is made, but not again for the second weapon on (as you only need to make one gold combo weapon for this trial). The counter will also not track multi-player only healing weapons.