Looking at an FAQ for a quick progress check, is Acre really about 1/3 of the way through the game?
There are nine targets/sequences, plus the endgame. How many have you completed? You don't have to do all the sequences in order, so you might already have done more than 1/3 and the FAQ writer did things the other way around.
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"I'm Commander Shepard, and you're standing in the biggest library in Citadel Space. Look me up."