User blog comment:Master Sima Yi/Assassinews 05-08-'14 – Assassin's Creed: Rogue announced/@comment-25625203-20141106195123/@comment-13471981-20141106195852

AC: Rogue takes place prior to the Connor part of AC3. Achilles is alive in that part. Logic dictates that Achilles needs to survive the events of Rogue for that to be possible. Conclusion: Shay does not kill Achilles.

Shay will most likely kill Adéwalé though.