EDIT: Looks like spartan loses health now.
Basic strategy should still work just play more cautious in the beginning!Mission 2 : A New Enemy
At first glance this looks like the hardest achievement in the game due to the Pestilence Skull
. BUT the skull drains the health of allied units AND enemy units which makes this a breeze.
The strategy is as soon as you start send in all available units to the first camp and take out all units. You will then receive more units once its cleared. Once you obtain kodiak support simply gain vision of the enemy and they should take out the base for you. Once the mini base is destroyed attack the bigger base at the bottom of the hill. Every time you lose units more units show up.
Now with your base built IMMEDIATELY
build turrets to defend your base so enemy units don't destroy your base. At this point you will have two warthogs spawn in front of your base. Once they are destroyed two more will take their place meaning you have unlimited warthogs
. Build all supply pads + one generator then take your units and move to take the right base. Once that base is down build all supply pads on that base. Add turrets to this base too. Now that you have two bases wait about 2-3 minutes for resources to stockpile then set your rally point to the right of the final base. This will allow your warthogs and marines to destroy the base without pulling much aggro from enemies on the left. Immediately destroy the red canisters to take out 2-3 base structures.
Now with the base destroyed set your rally points close to Decimus and train as many marines
as possible. When a marine dies just train another. This works best at the right base since it is closer Now sit back and wait for him to die by the constant stream of marines and your two constantly re-spawning warthogs!Congrats you just unlocked 40 gamerscore!