StarCraft2: How to get more research points

starcraft-2

I've passed campaign once and want to do on the Brutal now.

After passing all 3 first missions I did the "Smash and Grab" – the 1st artifact missions. Upon completion I've discovered that I don't have laboratory available… Then I did "The Evacuation" – the 1st colonist mission.

I've passed the missions twice:
– 1st time on Brutal level. Here I've collected all 3 Zerg artifacts and used one "re-load";
– 2nd time on Hard level to get "Sacrifice Nothing" achievement (Complete "The Evacuation" mission on Hard difficulty without losing or salvaging a structure). Actually I've completed "Handled with Care" achievement too (Complete "The Evacuation" mission on Normal difficulty without losing a Transport Truck). And also I've collected all 3 Zerg artefacts on 2nd pass.

When I've visited the laboratory I've discovered that I have 4 Protoss research points and 6 (!) Zerg points…

Question: What is a source of additional 3 Zerg points? As far as I know, till the end of all researches done no new research points are available when missions are completed.

Am I correct? Or each mission pass gives you all available missions research points?

P.S. Here is a similar question (I missed some research points in some levels, can I replay to get those points?), but it's answer is not clear for me.

Best Answer

If you're going back and RE-playing the missions, it'll take the research from the mission where you got the most research. So even if you did the normal mission and got 4 points, and then did the brutal mission and got 0 points, 4 points will be available in the next mission.

It won't double up though. I'm pretty sure about this: I did the whole campaign on hard, then went back and replayed every mission on brutal, and I know I didn't get extra research.