Not every enemy is critical in this mission in The Saboteur for the Xbox 360, just the ones with red markers over their heads. The third mission in Act 3: Déjà Boom is when Skylar is waiting for you in the northeast. When you land, grab the Tommy gun, the ammo, and then get in the flatbed nearby. Drive and just swerve around everything you can until you smash through the gate. For more info, watch the whole gameplay.
This is a "The Saboteur" walkthrough for Act 2: Mission 3 - Deja Boom
Mahalo's "The Saboteur" Walkthroughs are more than enough information for you to play the game yourself, and they teach you everything you need to be prepared. They lead you through the world of Saboteur and all of the tricks and achievements you will need to conquer along the way, moving from chapter to chapter. This video walkthrough focuses on Mission 3 in Act 3 (Déjà Boom).
The Saboteur by Pandemic Studios is the open-world action-adventure video game available for the Xbox 360 and PlayStation 3 consoles, along with Microsoft Windows. Avenge the loss of your loved ones by hunting down your sworn enemies in Nazi-occupied Paris during World War II. Fight, climb, and race your way through this unique world to destroy the lives of those that have taken everything from you. Enter the seedy world of a saboteur living in a stylized 1940's Paris, where the women are sexy, the missions are epic, and the revenge is satisfying.