Last Contract: Tower Defense [EARLY ACCESS] UPDATE

Breaching Protocol Update [Part 1]
[EARLY ACCESS. EVERYTHING IS A SUBJECT TO CHANGE OR TO DO]
[THIS IS PRE-ALPHA. A LOT OF BUGS CAN OCCUR. REPORT THEM AT OUR COMMUNITY SERVER]
"Contract signed. No extraction. Hold the sector."

Choose between different upgrades, count your ammo and upgrade the base.