Metal Gear Solid V Guide – How to Get a Higher Heroism Score

3. Complete optional objectives

Whenever you’re tackling a main mission or a side op, be sure to check your iDroid for optional objectives you can fulfill in the mission. Some of these will include rescuing a certain number of extra prisoners, stealing a particular blueprint, or destroying a number of armored tanks. Ticking off each of these will give you more points to be added to your Heroism score.