Homefront: The Revolution
74 Achievements
1,450
43-56h
Practical Mayhem
Deploy an active skill in a mission, and have at least one other player use the results.
10
0.18%
How to unlock the Practical Mayhem achievement in Homefront: The Revolution - Definitive Guide
You can actually interact with your own care package but I'm not sure if this unlocks the achievement.
(Online Co-Op)
The active skills are tier 4 skills, in any category. To get this trophy you will need to grind XP and money in order to buy a tier 4 skill. Make sure to place your skill points in the Survival tree to get Professor Mayhem faster.
It costs 1500 XP to buy a skill from tier 1, 2250 for tier 2, 3500 for tier 3, and 5000 for tier 4. Make sure to place all the skill points on the same tree focusing on the higher Tier (Once Tier 2 is unlocked, don't buy skills in Tier 1 anymore, etc...).
Once you have placed a skill point, you cannot remove it.
Don't buy any skills in the other trees, there is a limit of skill points, and if you buy skills on other trees, you will not be able to buy the 4 tier skill and you will need to create another character.
Once you have unlocked the active skill, play a mission and press to drop an item. Another player has to pick up this item for you to get the trophy.