Harry Potter: Quidditch Champions

The Constant Vigilance! achievement can be obtained as soon as you have unlocked the Seeker role. It does not need to be done in an online game.

In a match, as soon as the notification is displayed saying that the Snitch is being released, press Down on the D-Pad and select the Seeker role. Quickly find the Snitch by looking for the golden trail it leaves, and then chase after it using RT. Press and hold LT as often as possible to provide a boost, and fly through the gold rings the Snitch leaves to replenish your boost meter. When you have stayed close enough to the Snitch for a long enough time, you will be able to press A and catch the Snitch. If you made it this far without being hit by a Bludger by an opposing Beater, then the achievement will unlock!

Some tips to avoiding Beaters:
- Use the X button and move the Left Stick to make sharp turns/drift
- Press B to perform a dodge to try and avoid a Bludger coming your way

I hope this helps!