I played a lot of games and personaly I think that 3 player games often end up too fast for my taste.
Usually 2 people rush to tech 4 and 1 of the 2 extra achievments are usually done as well at this point. Game done.
In 2 player games you need the same 3 achievments but its a lot slower because 1 player can actually control the paste without fearing a very fast end. Its just not possible for the other one to rush 3 achievments at once.
In 4 players the 4 achievments buys some more time and usually the tech 3/4 research stuff is too crowded to have 3 people climb fast to Tech IV.
Usually 2 people rush to tech 4 and 1 of the 2 extra achievments are usually done as well at this point. Game done.
In 2 player games you need the same 3 achievments but its a lot slower because 1 player can actually control the paste without fearing a very fast end. Its just not possible for the other one to rush 3 achievments at once.
In 4 players the 4 achievments buys some more time and usually the tech 3/4 research stuff is too crowded to have 3 people climb fast to Tech IV.