I have been reading in many posts on the forum that tier 3 buildings are a waste of production. I guess, I’m either doing something wrong or missing some aspect because I don’t understand why or what you replace them with. If they're a waste, what do people build? I’d be interested to hear a better explanation. I’ve only had time to play 2 games of GS. The first was Inca and I played the way I normally do – beeline to education, beeline to chemistry, beeline to spaceflight – head to SV. Then I read various threads here about how tier 3 buildings are a waste/ underpowered so I decided to play Mansa and try a slightly different strategy in my second game and limit my tier 3 buildings. TLDR: Not building research labs resulted in my tech rate not keeping up with late game techs and a 30 turn later science victory. What is it I’m not getting about this tier 3 buildings are a waste statements? Because from my experience they definitely make a difference? Detail about the playthroughs – (I don’t have the saves so I can’t remember exact figures and turns) Both immortal, standard speed, standard map and continents. I’m not the most efficient player or the best city manager so my pop sizes are never astronomic. The top 2 cities of these 2 games had 18 pops by end game. Most cities had about 10. The differences in city numbers and pops between games are insignificant. I normally hard build 3-4 cities. Conquer my neighbour and grab 4-6 cities by turn 100-120. Get monumentality and back fill any spaces – giving me between 10-15 basic cities. Both games had similar wonders. Both games I’m at space flight around turn 200. My tech rate is about 300-350 at that time. In the Inca game I’ve beelined chemistry. I hard build research labs and spaceport at the same time. By the time I’ve got my spaceport 30 turns later I’ve built / bought research labs and have 500 science per turn and have teched through to the Mars project. By the time I’ve launched the Mars project I’ve teched up to the final project and the lasers. I build boost these and win on 285. Second game I ignore tier 3 buildings. I beeline space flight. I’m actually faster at this stage of the game than the Inca game - I’ve been able to rush buy a lot of uni’s. Because it’s Mansa Musa, my Big Ben takes ages to hard build but when it comes online I can rush buy a space port at about 210 turn. I’m at about 300-350 tech rate. All my cities have uni’s and I’ve snagged Newton. I haven’t built factories and only have a couple of IZ’s. Mostly it’s a ton of markets, traders, universities and theatre districts. From launching my satellite it takes me 100 turns to finish. Without RL’s my tech rate is too low -I am snailing through the atomic and information era. Round about turn 240-250 I decide to change. I rush buy research labs and power infrastructure across the empire. By turn 260-270 I finally get above 500 research rate when I get Einstein. I am in the opposite situation to the Inca game – launching space projects then waiting to tech. I finish at turn 312. Between the two games there are some differences in GS recruited and tech boosts. But the differences are negligible. The real difference between the games was with the tech rate when I stopped my tech growth hard by not building RL’s. What is it I’m missing? Why do folks say that tier 3 buildings don’t matter? Are you imagining infinite city spam and pumping out settler after settler instead of the tier 3 infrastructure?