Mass Effect 2 Discussion
I think that maybe Legion's loyalty mission is the trigger for the endgame. The second time I played through I did everyone's loyalty mission before going for the IFF. Got Legion, got his mission, did his mission, then immediately after I got the collectors attack.
The next and subsequent playthroughs I left Tali's mission and did hers after the IFF mission, then did Legion's mission, THEN got the collector attack.
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