As of U183, this mod is now broken and all efforts will be discontinued.
Instead, please see the sequel of this mod: ZEAL Redone 2
A retexture of the ZEAL units to give them the semi-futuristic Black Ops look.
The main idea comes from a loading screen tip that says the ZEAL units use urban camo. The camo and general unit design is mostly inspired by Deus Ex Human Revolution.
In playtesting this mod also made Death Sentence slightly difficult due to normal ground units being slightly harder to distinguish at quick glances or at long distances. Whether this makes DS more difficult on your end depends on your perception.
Changes are as follows:
Light: They wear a dark camo BDU and balaclava. Optional file that changes their BDU to black.
Heavy: Armour and BDU changed to dark camo. Optional (semi-broken) lite version that only changes torso armour and BDU.
Cloaker: Armour plating changed to black.
Bulldozers: Bomb suit given a camo based on their colours. Black Zdozer is also affected but their ingame rendering makes it really hard to see so I guess the black Zdozer can be considered unmodified.
Note: The ZEALs use custom weapons in the screenshots because of the NPC Weapon Customizer mod. On your client, they will use their vanilla weapons. This mod does not give them new weapons.