Achievement, "The great battle of our time", won't unlock

I won't unlock half the achievements,but that wasn't the point I was making. Arcade mode is just a glorified training exercise tbh and really does lack substance.

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I find Quick Battle to be great and Namco have put great effort into creating over 200 seperate fighters for you to beat. Albeit sharing movesets with the main characters.

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I unlocked Kilik via the Leaderboard route.

I never got to play it the first time around and I'm finding it amazing.

Lots of stuff online saying "it's bad", "doesn't work", "sound is faulty", "achievements won't unlock" but I've played my way to Stark Tower and it looks great. Sure it's a little dated but there's no slowdown and you soon lose yourself in the story and
game.

Plays great.

Sound is fine.

Achievements are unlocking fine.

Great game.

It would be great if we could unlock gear for our avatar reaching certain amount of achievement for a game

To add to this madness, sometimes achievements will show up as unlocked on Xbox Smartglass, but they won't pop on the console (even if online). I've had this happen a few times, where I've done what the achievement requires, but it won't actually unlocked
for a couple days.

I had to redo the season unlocked 2 achievements just need battle-car collector is locked supposed to be unlocked