Tips and Tricks
To hire the other agents, visit the Agency screen, head to the Store and see which Agents are available to purchase.
Training is essential to making a better spy team, as they'll learn new skills and techniques to work faster and bring down enemies. Head to the Training Room after it's built in your headquarters, then select the agent you want to train. Pick which specialty room to train them in (you can build multiple rooms in your headquarters) and watch them improve in a matter of minutes.
Keep in mind that the higher your agents are in skill strength, the better chance they'll have of completing the mission.
Make sure that you have a sufficient amount of energy before taking on a mission. It'll save you a little cash in the long run.
Stations are a great way to keep your spy headquarters going strong, and you can always expand upon them with new training facilities, traps and other gadgets. Visit your Agency tab and select Stations, then see which buildings you want to put together and upgrade.
Also make your key goal to keep the Command Center up and running, then worry about the other buildings. Don't forget to set Traps.