18 4 3This is a story-related achievement and is unmissable. Just beat all the missions in sequence 7 (4 missions, no optional objectives required). Unlocked after you finish the mission "The Fireship".Showing all 3 comments. Leave a comment. Have completed sequence 7 & no achievement Posted by MCFC Blue Nose on 14 Oct 18 at 21:03 Have also completed sequences 7 & no achievement :(Posted by bchay2508 on 01 Jan 19 at 21:29 Just finished sequence 7 and no achievement.Posted by MarioToo on 24 Jun 20 at 18:26 Leave a comment