How to unlock in horde I am stuck

How do I get the other unlocks in horde. I have unlocked: decoy, turret and barriors I am on level 30 in horde and the option for the other unlocks have not even come up yet. Is it because of the map I am on? If someone could let me know

 

it takes a lot of the others first , they will pop up in due time.

just stay on it !

 

when you get to a level 7 on barriors you ll unlock the silverback

 

i looked at stats and you have to spend x amount on decoys and barriers cheers guys

 

Try my files for horde mad. Unlocks go by money spent so since E put cost down to 0 it's gonna take forever to unlock.