This was rather "fun" to obtain, in a nutshell super sonic needs to score the last hit on each boss in order for you to obtain this achievement/trophy.
But that's not the best part, I forgot that Act 1 of Death egg mk.II counts as a boss act. So it's the last thing I do to obtain it. Just follow the list below to go to a specific boss fight.
0:10 - Sylvania Castle Boss
1:45 - Fun Fact - Super Sonic deals double damage to bosses =D
2:39 - White Park Boss
5:52 - Oil Desert Boss
9:20 - Sky Fortress Boss
10:45 - Fun Fact - Tails is an insane pilot. Additionally to the information within the video itself, Sonic is also a driver's ED teacher for Tails.
11:43 - Death Egg mk.II Boss
15:06 - I had an extremely unamused face when I didn't get the achievement
15:24 - I really was trolled
15:40 - Death Egg mk.II - Act 1 (yeah this counted as a boss act, can't believe I didn't realize that sooner).
16:44 - Fight with Metal Sonic and our favorite repair man-man-man-man-man.
19:04 - Super Sonic + racing against Metal Sonic = Iizuka's laughter.
19:30 - ACHIEVEMENT GET!
20:19 - Tails wants to fly high.
Just like the last video, if you're wondering why resident evil 5 is up there twice in the achievements list, it's because for some random reason, it added the pc version as a separate game. So I have 2 sets of achievements for the same game :|
The only thing I'm missing is the "I love Tails" achievement/trophy. I'll make it short, the game counts you playing as Tails when you reach the results screen of a stage/special stage. For the special stage, you reach the results screen whether or not you win/fail a special stage. Take that as a large hint, and the special stage trick only works in local co-op.
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