Halo: Spartan Assault
30 Achievements
1,000
20-25h
Skull Combo
Complete any campaign mission with the maximum number of Skulls active
20
8.81%
How to unlock the Skull Combo achievement in Halo: Spartan Assault - Definitive Guide
Strategy One
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TrueAchievements
Load up the first mission, when you look in the armory, the skulls will be on the right hand side. Use your D-pad to navigate over to it and once it is highlighted just use the LT and RT to scroll through the skulls. I would recommend doing this on the first mission, use the Famine Skull (Less ammo dropped), Blind (no HUD like health, ammo, or radar), or HOLLOW (Only have a shield that will regenerate).
DARK X STEVE
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TrueAchievements
BiggD, WORLDEATER
This achievement will come naturally while you are working on either of the two Vidmaster achievements in the Single Player. However, for a much easier route, I suggest using the method that is mentioned in the "Pension Plan" achievement.
You will want to essentially complete Operation A, Mission 1 with both the Black Eye and Hollow Skulls active. This mission takes no longer than a minute and a half, and these two skulls do not harm you negatively, since this first mission is very, very easy to complete. The achievement will unlock at the post-game stats menu once the mission is completed.
Shiftie
You can apply a maximum of two skulls for any given mission, and this can be easily done on mission 1 if you apply Hollow (Spartan has only a shield) and Famine (Enemies drop weapons with less ammo). Really you can use any skulls you want, but those are the easiest. You can also get this done while doing the "Vidmaster Challenge" mission, as you will be required to use two skulls for that.
