Here are the Time is running out missions with tips and hints.

Mission 1 : secure the halls
Mission 2 : enter another hall
Mission 3a : way to the power station
Mission 3b : street fight area
Mission 4 : enter the power station
Mission 5 : find Dr. Reich
Mission 6 : escort Dr. Reich
Mission 7 : the portal
Mission 8a : lead the 2nd attack path
Mission 8b : advance to the fort
Mission 9a : way to the fort A
Mission 9b : way to the fort B
Mission 10 : in front of the fort
Mission 11 : conquer the fort
Mission 12 : the hole
Mission 13 : under-city
Mission 14 : heaters
Mission 15 : cross the drawbridge
Mission 16 : the nest
Mission 17 : rescue the wounded unit
Mission 18a : defend path A
Mission 18b : defend path B
Mission 19 : footbridge path A
Mission 20 : footbridge path B
Mission 21 : statue park
Mission 22 : the aid station
Mission 23 : residential area #1
Mission 24 : residential area #2
Mission 25 : to the flak battery
Mission 26 : halls #1
Mission 27 : halls #2
Mission 28 : Rutherford alone
Mission 29 : astroport #1
Mission 30 : astroport #2