Brink will receive a free Agents of Change add-on in June that adds maps, abilities, weapon attachments and outfits.
Developer Splash Damage decided to waive the cost as an apology for the early-days bug fixing.
The Agents of Change maps are Founders' Tower, which takes you into that sky-scraping iconic spire, and Labs, an underwater science haven untouched by the civil war.
There are five new abilities: UAV, a spy device for marking opponents on the map or for detonating near unsuspecting foes; Napalm Grenade for thrown explodey fire; Pyro Mine for planting explodey fire; Field Regen Unit, for reviving all squaddies within an area; and Tactical Scanner, for revealing enemy buffs.
New weapon attachments are a stabby Bayonet and a riot-style stick-on Weapon Shield.
The Sad Punk and The Limey - a "traditional" European police officer - are the extra outfits.
Brink spent a third week in the UK all-formats top five software chart this morning, finishing fifth.
Eurogamer awarded Brink 8/10. "Brink is an exceptional team shooter, smart, supremely well balanced and with a unique, exciting art style," reviewer Simon Parkin wrote.