PAYDAY 2
43 Achievements
1,000
Weapon Collector
Own 18 weapons.
20
How to unlock the Weapon Collector achievement in PAYDAY 2 - Definitive Guide
What does this mean? All of the achievements relating to purchasing skills or adding to your inventory can be gained by making local copies of your "Player progression" file on an alternate source of memory than your primary hard drive, and using this copied file to make any desired changes to your selection of inventory and skills, with no resulting change in your primary "Player progression" file.
To unlock the "Weapon Collector" achievement, you can still purchase however many of the introductory $12,000 weapons, but now you can spend your money with a local copy of the "Player progression" file on another source of memory, rather than having to spend that extra money on your primary "Player progression" file.
Credit for this solution goes to GatorFist.
After that its fine to sell them all to try and get a bit of your money back, but I would recommend waiting till you can easily afford doing this than aiming for it straight away as purchasing skills is much more useful earlier on.
You only need to buy 16 weapons as you automatically begin with 2 that you cannot sell.
If you're going for the 1000G, you will have more than enough to buy every individual weapon regardless. There 26 weapons in total, 13 primary & 13 secondary.
Buy weapons as you get more money. Self explanatory.
However, if you want to get the achievement when you'd rather use your money to buy skills, masks and other items I have found a way to make it easier.
Buying duplicates of the lowest costing weapons work. Alternate between buying the primary and buying the secondary weapons. Once the achievement pops after owning a total of 18 or more, dashboard immediately. Your data doesn't save unless you go back to the main Crime.net menu. Dashboarding allows you to keep your money to the last save point when you start the game again, which it would most likely be used for more meaningful things than a plethora of weapons.
However, if you want to know which are the best guns to own in the game and their damage output, shoot-to-kill stats, etc, etc, etc... then check out this spreadsheet.
Payday 2 Weapon Spreadsheet
https://docs.google.com/spreadsheets/d/tAhowOnI3FrQ1d6nqOTl9...#
It's unbelievable how much detailed data there is.
To buy weapons, go into the Inventory from the Main Menu. There are a total of 26 weapons in the game, 13 Primary and 13 Secondary. You do not have to own 18 unique weapons, you can buy several of the same weapon and still unlock the achievement. The AMCAR Rifle and Chimano 88 pistol both cost $12,000 each. If you buy the Improved Crafting skill under the Technician tree, then this will make weapons even cheaper; the AMCAR rifle will now cost $10,800. You will be able to unlock more powerful weapons as you progress through reputation levels.
Primary Weapons
Starting rifle - AMCAR Rifle - $10,800
Rep 4 - AK Rifle - $43,200
Rep 4 - Car-4 Rifle - $48,000
Rep 8 - UAR Rifle - $94,500
Rep 8 - Reinfeld 880 Shotgun - $94,500
Rep 16 - JP36 Rifle - $203,400
Rep 16 - AK. 762 Rifle - $203,400
Rep 26 - M308 Rifle - $349,200
Rep 26 - Izhma 12g Shotgun - $349,200
Rep 33 - AK5 Rifle - $454,500
Rep 39 - AMR-16 Rifle - $547,200
Rep 39 - Mosconi 12g Shotgun - $547,200
Enforcer - OVE9000 SAW - $10,800, Requires Portable Saw Skill
Secondary Weapons
Starting pistol - Chimano 88 Pistol - $10,800
Rep 2 - Crosskill Pistol - $20,700
Rep 2 - Mark 10 Submachinegun - $20,700
Rep 6 - Bronco .44 Revolver - $68,400
Rep 6 - Bernetti 9 Pistol - $68,400
Rep 13 - Locomotive 12g Shotgun - $162,000
Rep 13 - Compact-5 Submachinegun - $162,000
Rep 19 - Para Submachinegun - $246,600
Rep 19 - CMP Submachinegun - $246,600
Rep 29 - Krinkov Submachinegun - $394,200
Rep 29 - STRYK 18c Pistol - $394,200
Rep 36 - Kobus 90 Submachinegun - $501,300
Rep 36 - Deagle Pistol - $501,300
For this, you must own 18 weapons at once - 9 primary weapons and 9 secondary weapons. The cheapest method for doing this is buying 8 AMCAR Rifles and 8 Chimano 88 Pistols for $688,000. Once the trophy pops, you can sell them all back to get about $200,000 back. If you want to keep the money, simply back up your savefile before hand (either to PS+ or a USB drive), complete the trophy, then copy back your original savefile.
Save up some money - $192,000 and buy it in every free slot (16 slots).
Then all the weapons can be sold, but only for $48,000