Killzone 2: Secrets - Corinth River

Mission: Corinth River - Verdran Overlook West

Localization: After getting to the other side of the dam, in the centre of the corridor. You can't miss it because of the info regarding the suitcases displaying on the screen in this spot.

Mission: Corinth River - Verdran Overlook East

Localization: After entering the warehouse, behind the Intruder wreck. Under the stairs leading up.

Mission: Corinth River - Stahl Arms Warehouse

Localization: When you get to the dam's steering room, look out of the window in the direction of the steering room on the other side (the one with Helghasts).

Mission: Corinth River - Verdran Overlook West

Localization: Down the stairs. When you will get an information about the Helghast symbols.

Mission: Corinth River - Verdran Overlook East

Localization: In the corridor which you will pass after defeating some enemies in a big room. Behind the fence.