Easy work around.
1. Have ad in hand.
2. Go to the electronics department and get the games you want.
3. Check out. If they ring up full price, show them the ad. Tell them it is in the ad for so and so price until so and so time. It is in that time so you want it at the advertised price.
Chances are the lines will be long so they probably won't put up much of a fight as long as you're wanting a game that is specifically shown in the ad.
Last time I didn't take it to the electronics department. But the last time there wasn't anyone there. There was just one gigantic line cascading around the whole store. This line had boxes with specially marked games.
For example, Infamous was like $10 that year. But when we found a non sale copy, the sale dude was like "sorry too bad" because it didn't have the black friday sticker.
Perhaps I just wasn't tenacious enough.