Ryse: Son of Rome
76 Achievements
2,000
47-61h
Et tu, Brute
Save the Emperor (finish chapter 1) and then kill him (finish chapter 8)
100
27.14%
How to unlock the Et tu, Brute achievement in Ryse: Son of Rome - Definitive Guide
The achievement will pop as soon as the cut scene begins :)
No sense playing a whole level if you can just watch a short cut scene. But it's your life do what you want :D
For most people who have already played the game, this may unlock for you automatically, or may be stuck at "Done, unlocking..." If you get the latter, there are two alternatives for you to use. You can either wait out the achievement to unlock, or you can replay the first/maybe last chapter.
For me, I had it stuck at the done unlocking and replayed the first chapter on the easiest difficulty. During the final cutscene the achievement unlocked. It has been reported that simply replaying the first chapter did not work for some people and they instead had to do both the first and last. If this the case for you, simply replay them both to unlock the achievement.