"oh, i know this part." Hidden Challenge won't unlock.

[Mike_Lilley_95]

The hidden challenge of "oh, i know this part" is not unlocking for me.  I have read online you should get this when you unlock the weapon upgrade station (pack-a-punch) for the first time, but i have unlocked this multiple times and still nothing.

[Coolgamer209]

Thats one of the steps. Their is still 4 more parts u have to do in order to unlock it. There is a total of 5 parts for every characters and these are the five parts for that character.

• Part A - Killed a Treasure Zombie for the first time.
• Part B - Defeated the Panzermorder for the first time.
• Part C - Survived 25 waves in Final Reich.
• Part D - Unlocked the weapon upgrade station for the first time.
• Part E - Assembled the Tesla Gun by wave 6.

[Mike_Lilley_95]

I've done the other parts, the challenges show as complete. It is just Part D that won't unlock.

[cdubeaver]

Are you unlocking PAP or is someone else in the game doing the steps? Maybe try a solo custom match and run through the PAP steps and see if that works

[Mike_Lilley_95]

I've done it solo numerous times, i've only ever played solo custom games so far.

[Niijii519 · Accepted solution]

"Oh i know this part." is build tesla gun by end of round 6.

[RAPIdFIRe]

I’ve had the same issue, done all the steps and still not unlocked

[Hellraiser702]

Does this need to be played “online” to unlock the character? I conquered it playing local it said I have unlocked the hidden challenge but I still don’t have the character. 

[HorrorZombie01]

Do it in a custom game online it works for me and all i need is one more step then i have the character unlocked

[Jer420uyfg87grv9]

I have the same problem. I built the tesla gun long before 6, I got the others also, but I do not have that even though I've done it multiple times now. And yes on solo, online, so no it's not those like he keeps saying. It just didn't unlock.