Several facilities are placed around the map to restore health and weaponry or provide easy access to different areas. If the mission has a time limit, the clock stops while the player is inside one of these facilities.
Radar bases[edit]
There are a total of 8 radar bases placed around the map, and the player can enter each base once per mission to restore one block of shield health, missiles, and fuel, along with a choice to equip one additional weapon. Each radar base can be entered from any direction, and the center screen will display the mission objectives once the player is inside. Warnings are given by the radar bases when there is very little time remaining on the clock in missions with time limits.
Tunnel entrances[edit]
These are the entrances to the four underground tunnels described in the Controls section. Tunnel entrances rotate slowly, so the player must maneuver the tank inside with good timing in order to enter. The back part of each entrance is a slope, which can also be used to lift off into the air.
Junction[edit]
All four underground tunnels lead to the Junction. The player can choose which tunnel to enter, and completely restore one of the three gauges (shield health, missiles, or fuel) once per mission.
Nuclear Silo[edit]
This building plays an important role in certain missions. It can be entered the same way as the radar bases.