Complete the 'Friend Of Freedom' achievement. Complete the 'Friend Of Duty' achievement. Complete the 'Friend Of Stalkers' achievement.
Complete the 'Courier Of Justice' achievement.Ĥ.
Complete the 'Battle Systems Master' achievement.Ģ. The ending is determined by actions you took over the course of the game.Įach action unlocks an extra sequence of the ending you normally would notġ.