To get this achievement you have to play arcade mode on hardest and
fight and beat Gouken. The requirements for fighting Gouken are the same
as they were in the original Street Fighter 4. You must not lose a
round, and I suggest you use only 1 round but keep it at 99 seconds. On
top of not losing a round, you have to get at LEAST:
- 1 perfect
- 3 ultra/super finishes
- 5 first attacks

Now when you actually fight Gouken you can't lose, otherwise you'll
have to start all over because it just ends if you lose to him. Now,
the more rounds you have it set on the higher those requirements for the
amount of perfects and ultra finishes and such get, but I don't know
why you'd want to torture yourself. As for what character is easiest to
use... Zangief is my main and you could use your main if you're fairly
good but the thing about Zangief is he's easy to use against CPU. Just
spam his Lariat, i.e. either all 3 punches or all 3 kicks, the kicks are
quicker but do slightly less damage. If spamming his Lariat doesn't
work then sit back, wait for them to attack and then once they do,
Lariat to counter it. To build up ultra meter you can either sit there
and take hits or be smart and just focus attack(medium punch + medium
kick) fireballs/attacks then dash out of them. Or you could do super
finishes but it takes longer to build up super. His Ultra 1 is pretty
easy to pull off too, just spin the stick around 2 full times and hit
all three punches. Just a side note, no matter what character you're
using always use the Ultra you know you're going to be able to land when
trying to get this achievement. Hope this info helps, happy chievo
hunting! =)