I had been pretty diligent in picking up every research I could and only had about 3 rows of research left to do (excluding infinite technologies) I knew some of them were very expensive, but there were also a lot of cheaper ones like Gun turret damage 6 left. I thought a realistic number would be around 65%, though I hoped for 75% or even 80%.
So I created a spreadsheet and tallied up the cost of all technologies. Please note that I used the raw raw resources from the wiki (so only iron, copper, coal, stone and crude oil). I know this is a drastic simplification, but I didn’t want to know what was left to do specifically, only how close I was, and I hope any errors mostly canceled each other out.
What I found, shocked me.
Just for reference: I had already unlocked Rocket silo, I had researched every technology only requiring red, green, blue and military science packs and I even had a lot of the best bonuses maxed out.
I had fully upgraded bullets, shotguns, laser turrets, combat robots, worker robots, lab research speed, inserters and logistic slots. I only needed to research 30 more techs! Out of 236!
Now guess how close to the achievement I was (using the combined resource cost of all the technologies I already researched / the total cost of all technologies)