You are now inside the Citadel, the heart of the Combine's operations. This chapter is a tense infiltration, where your Gravity Gun is supercharged, making it an incredibly powerful weapon.
Half-Life 2
Chapter 13: Our Benefactors
Infiltrate the Combine stronghold in Half-Life 2's Chapter 13: Our Benefactors. Utilize your supercharged Gravity Gun for intense combat within the Citadel.