Top Drone Achievement/Trophy
The "Top Drone" achievement/trophy can be earned after purchasing all the upgrades in the "Drone Skill Tree". This achievement will take you a while as you are required to reach level 15 to unlock all nodes in the skill tree.
Below is a list of the skill tree and the upgrades & materials needed to unlock them.
Player Level 1 Unlocks the following;
"BATTERY INCREASE"
Level 1 - 1 Skill Point - 25 Gas
Level 2 - 2 Skill Points - 550 Comm Tools
Level 3 - 3 Skill Points - 1250 Meds
Level 4 - 4 Skill Points - 2500 Gas
"NIGHT VISION"
Level 1 - 2 Skill Points - 50 Comm Tools
"RANGE"
Level 1 - 2 Skill Points - 50 Meds
Level 2 - 3 Skill Points - 700 Food
Level 3 - 4 Skill Points - 1450 Meds
Level 4 - 5 Skill Points - 2750 Gas
Player Level 7 unlocks the following;
"SPEED"
Level 1 - 2 skill points - 300 Comm Tools
Level 2 - 3 skill points - 1250 Food
"MARK AREA"
Level 1 - 2 skill points - 450 gas
Level 2 - 3 skill points - 1625 meds
Level 3 - 4 skill points - 4375 food
Level 4 - 5 skill points - 8000 Comm Tools
"STEALTH"
Level 1 - 2 skill points - 500 Comm Tools
"COOLDOWN"
Level 1 - 2 skill points - 550 Meds
Level 2 - 3 skill points - 1750 Food
Level 3 - 4 skill points - 4725 Meds
Level 4 - 5 skill points - 7000 Gas
"NOISEMAKER"
Level 1 - 2 skill points - 400 Meds
Level 2 - 3 skill points - 1375 Meds
Level 3 - 4 skill points - 3850 Food
Level 4 - 5 skill points - 8000 Comm Tools
Player Level 15 unlocks the following;
"ZOOM"
Level 1 - 3 Skill Points - 5500 Comm Tools
"EXPLOSIVE"
Level 1 - 3 skill points - 1500 Gas
Level 2 - 4 skill points - 3375 Meds
Level 3 - 5 skill points - 7000 Food
Level 4 - 6 skill points - 9400 Gas
"EMP"
Level 1 - 3 skill points - 1500 Food
Level 2 - 4 skill points - 3375 Comm Tools
Level 3 - 5 skill points - 6650 Gas
Level 4 - 6 skill points - 10000 Meds
"ARMOR"
Level 1 - 3 skill points - 1200 Meds
Level 2 - 4 skill points - 3125 Gas
Level 3 - 5 skill points - 5425 Comm Tools
Level 4 - 6 skill points - 10000 Food
Epic Skill
"MEDIC"
This will unlock after unlocking all previous skills.