First of all, these Achivements were gotten on the Beta version of the game.
(IMPORTANT FOR THE Cheli Venco Deho Achievement)

Here you can find how to change the game to the Beta
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=2941228877

• Do this on Easy & Easy difficult to make it less tedious
  
• On the 1st & 2nd Missions try to gear with your playstyle weapons to your soldiers
  
• Do not care keeping up the states, just keep 3 up to have more Missions = More Gun Chances
  
• Complete this achievements when you have the easiest ones before

(Recruit all Soldiers, Survive for 63 Days, 63 Days of Glory. Etc...)

In order to getting the weapons, there's a small trick that i've found.
Whenver you're going to a new Mission looking for X Damaged Weapon and it doesn't show up on a Mission, just click on "Return to the Main Menu" and then reload your game so you will have DIFFERENT MISSIONS + REWARDS

Here very probably you will get the MP 65


Also when you get a new damaged weapon it has DIFFERENT PRICES so i made the list of the weapons and its prices so we can get them more easier, see the example below so you can understand how to get the remaining weapons.

EXAMPLE:

Here is a "Damaged Grenade" which sells for 110



So when we repair it, it will become a Nebelhandgranate, since its price is different from the other Damaged Granades.



JUST FOCUS ON THE "DAMAGED X (WEAPON)" PRICE.
(The Prices of the Broken Weapons will be listed below)

• PRTS-41 (Damaged Heavy Weapon sells for 110)
  
• UR wz. 35 (Damaged Heavy Weapon sells for 125)
  
• Panzerfaust (Damaged Heavy Weapon sells for 130)
  
• PIAT (Damaged Heavy Weapon sells for 140)
  
• PANZERSCHERK (Damaged Heavy Weapon sells for 155)

• SVT-40 (Damaged Rifle sells for 50)
  
• Mosin-Nagant (Damaged Rifle sells for 60)
  
• Winchester 1895 (WIP)
  
• Kar98k (WIP)
  
• Gewehr 43 (WIP)
  
• Lebel Model 1886 (WIP)
  
• Mannlicher 1890 (WIP)

• GEBALLTE LADUNG (Damaged Grenade sells for 100)
  
• Nebelhandgranate (Damaged Grenade sells for 110) | Check the Example for better understanding
  
• ET-40 Filipinka (Damaged Grenade sells for 120)
  
• MOLOTOV (Damaged Grenade sells for 122)
  
• No. 82 Gammon Bomb (Damaged Grenade sells for 125)
  
• Stielhandgranate (Damaged Grenade sells for 135)
  
• F1 Granate (WIP)
  
• Bundled Stielhandgranate (WIP)

• Sten (Damaged SMG sells for 40)
  
• PPD 52 (Damaged SMG sells for 50)
  
• MP 34 (Damaged SMG sells for 50)
  
• PPSh-41 (Damaged SMG sells for 50)
  
• PPD 40 (Damaged SMG sells for 55)
  
• Thompson M1 (Damaged SMG sells for 60)
  
• MP 28 (Damaged SMG sells for 65)
  
• MP 40 (Damaged SMG sells for 80)
  
• PM Błyskawica (WIP)

• Nagant M1895 (Damaged Revolver sells for 35)
  
• Colt 1917 (WIP)
  
• Enfield No. 2 (WIP)
  
• Lebel Model 1892 (WIP)
  
• Nagant wz. 1895 (WIP)
  
• S&W M&P 1905 (WIP)
  
• S&W Victory (WIP)
  
• Webley & Scott Mk VI (WIP)

• MG 42 (Damaged Machine Gun sells for 105)
  
• Bren (Damaged Machine Gunsells for 120)
  
• MG 13 (WIP)
  
• MG 34(WIP)
  
• BAR wz. 1928 (WIP)
  
• DP-27 (WIP)

• Colt M1911 (Damaged Pistol sells for 45)
  
• Vis (Damaged Pistol sells for 50)
  
• Luger P08 (Damaged Pistol sells for 55)
  
• Walther PP (WIP)
  
• TT-33 (WIP)
  
• Mauser C96 (WIP)
  
• Steyr M1912 (WIP)

Probably not the hardest one since you can get it while playing, BUT REMEMBER:
YOU NEED TO HAVE THE GAME IN THE BETA VERSION TO GET THIS ACHIEVEMENT.
(Go to the things to know section to see how to change it to BETA version)

Like the Weapons list, here's the MAJORITY (NOT ALL) of the events that you could get after completing a mission.
(Not sure if it also counts the Events on the Missions, i got this achievement by restarting and reloading with ALT + F4 everytime i finished a new mission to get a different Event. I'd recommend to Alt+Tab and note the events that you already complete so you don't make them twice.)

• Buried, Recovered, Buried
  
• New Blood
  
• What Else Remains for Me
  
• Never Been So Much Fun
  
• The Barrier Between Us
  
• Night of the Lilies
  
• ... And Nothing Hurt
  
• No Juice
  
• Don't Run Dry
  
• Refocusing - last hevya weapon
  
• The Man Comes Around
  
• Perfect Timing
  
• Mundane Hours
  
• Points of Contention
  
• Prolonged Bombardment
  
• Grinding Halt
  
• Der SteppenWolf
  
• What Uprising?
  
• Caught in the Fire
  
• Love Thy Neighbor
  
• Ira
  
• On the Prowl
  
• Approaching Dusk
  
• Endurace Game
  
• Fleeting State