What will you do if you are out numbered by a number of Alien troops? You may have your own solutions, but Starhawk will encourage you to build some structures like some defensive wall and turrets, etc. to defend the lines.
The most intriguing feature of the game is that it will allow you to build these structures during the battle depending on the need. The trailer demonstrates the possibility:
Build your own base just like an RTS game and then shoot the hell out of your enemy. Devise your own strategy and execute it like a Boss.
If the trailer is good enough to excite you, then you can take part in the beta of this PS3 exclusive by following this link. Starhawk is set to release on May 8.