Well, as a lot of people should have the same problem, I'm still confused to why I cannot find the 13th weapon attachment in SP. I've completed the game over 20 times. Searched every single corner of the game. I got all the souvenirs, dog tags, car keys and e-mails but for some reason I cannot fathom, I am still missing the last piece to the puzzel which is the 13th weapon attachment. Looking at the 12/13 numbers makes me more annoyed each time. Any hints, clues or fixes that can ease my rage?!

Well, as a lot of people should have the same problem, I'm still confused to why I cannot find the 13th weapon attachment in SP. I've completed the game over 20 times. Searched every single corner of the game. I got all the souvenirs, dog tags, car keys and e-mails but for some reason I cannot fathom, I am still missing the last piece to the puzzel which is the 13th weapon attachment. Looking at the 12/13 numbers makes me more annoyed each time. Any hints, clues or fixes that can ease my rage?!

i think the 13th attachment is the MP-only hologram!
yep that right - you cant get 100% now...

You're probably missing the Gauss attachment... go to Corporate Collapse and pick up one of the SCARs.

You're probably missing the Gauss attachment... go to Corporate Collapse and pick up one of the SCARs.

GAUSS CANT BE THE ONE!

there are LOADS of gauss' lying around!

Ive seen someone get into a single player custom level with all weapons and attachments. There are only 12 attachments in single player even though the game says there are 13. Just like there are only 22 modules but the game says there are 23 in multiplayer.

As codename205 said, you literally cant get 100% completion at the moment.

Maybe there is a hidden attachment and module somewhere...you just have to kill every enemy with melee...pingers included.

Then the hidden attachment and module will be revealed, and it's...iron knuckles!!! And the free fists module!!!

But then owait WTF? Why would I want this junk when I have nanosuit knuckles and MAXIMUM STRENGTH individually at Lingshan island?

Hmmm...I guess the 13th attachment is for FREE in Crysis 1.

Oh, I thought you were referring to the percentage of people who ditched this game.

the last part is the pistol laser dot and its invisible (as far as i know)

Lol how do you even get that much completion? After beating the game I'm only on ~40%

How can you complete it 20 time?

There is no challenge for experienced gamer in this game...