mrdrnose, I have some ideas for your game. I really enjoy it btw.
My ideas is:
1 ) portable radar and portable camera monitor (You can do it so that if the tower goes offline then radar/camera monitor don't work, and back to normal as you repair the tower. ) Can be bought in store
2) some sort of jetpack for story mode, it consumes gas, but has height limit, and slow speed (like walking) can be craftable more strong, long-working and fast version (like omega kerfur) and "stock" one, can be bought in store
Its all for now, maybe i update my ideas later
(Update of ideas):
3) Pet ariral (After the event and the egg under the door, the player could have the opportunity to grow it into pet ariral using a new item - an incubator)
4) an incubator (can be bought through the store, needs power from socket to work)
5) trash - gas converter (can be crafted with kerfus parts and other materials, converts trash (full trash bags) to gas cans for generator/ATW. Needs power from socket to work)
6) Easter egg "Joel's anti-alien alarm" signal. May appear randomly and spawn some angry ariral entity around base if it be sent to headquarters, because they play it and arirals get mad at player for it. Its gonna be fun