I think it should be a new pda and the shield and the trap should replace teleporter enterance and exit to not make a direct upgrade

New PDA (Can't decide a name)

* Replaces teleporter enterance and exit (to not make it a direct upgrade)

Shield Generator

* The shield has 3 levels each level requires (200 metal)

* The shield has to have metal in it absorb the damage (200 metal)

*The shield absorbs 75% of all damage by using the metal in it

*Shield metal and metal used to upgrade the shield use the same counter

*Costs 100 metal to be built

Bear Trap

*Can only be built on flat surfaces

*Deals 30 damage and gives bleeding effect for 5 seconds when stepped by an enemy

*When someone steps on the trap the trap closes and creates a loud noise alerting the engineer

*Costs 50 metal to be built and you can have 2 traps but a trap destroys itself after an enemy steps on it

I kinda could not explain my idea for the shield generator what i wanted to is i wanted the shield to absorb damage based on how many metal it had inside it like if the shield recieves 60 hit points of damaged the shield would absorb the damage and lose metal in return and the shield uses the same metal used to upgrade so you would have to be careful when upgrading

Let me know if you have other stat ides or if you think some of these stats could be different also sorry for my bad english