Most of these will likely come naturally as you play through on easy/normal, if however you are struggling on any particular mission, activating the negative skulls will give you an added bonus and can be done so on easy difficulty without adding too much of a challenge. you can earn gold on half the missions playing on easy and the rest playing on normal or heroic. You can also play on different difficulties and still unlock the achievement i.e. Unlike other Halo titles, difficulty doesn’t factor so you can obtain gold medals on easy without penalty. Thus, the key is to beat each mission under par time, losing as few units as possible and completing all objectives. The score is determined on how well you managed your units (the key being to lose as few as possible), the time taken to complete the mission (the faster, the better) and the optional objectives completed. Then both interlocks will be locked in and can't be unlocked (the floors in front of the. there are six, activate one and activate the one directly opposite with the SAME gylph embedded. At the end of each mission you will be given a medal based on your performance. There is no specific order per say, but you must activate the interlocks with identical gylphs - I.e.

Halo wars definitive edition code