You can always save, spend your research/credits on one set of upgrades, play a mission to unlock the achievements, then reload your save to spend the credits/points elsewhere. I'm assuming that you aren't as concerned about what order units are unlocked in, since that depends on a lot of things and it's hard to provide a definitive answer.Īnother variable to consider is that achievements aren't tied to a particular save. However before you can use it, it has to charge itself. The Xel'Naga Artifact has been assembled and it can be moved towards the main hives. This cuts a lot of variables out of an optimal achievement-hunting run since you only have to have a plan up to the point in the campaign where you cap your research points, but there are still a lot of things to consider. Next Campaign - Final missions All In (Achievements) Prev Campaign - Final missions Belly of the Beast (Achievements) Main objectives: Defend the Artifact. This means that as soon as you progress far enough through the campaign to max out your research, you can take a break from the new missions to grind credits for any unit/building upgrades you may have missed. Once your Zerg/Protoss research is capped out at 25/25, replaying old missions will grant you 10k credits for each research point you re-earn.

Wings of liberty brutal upgrades