Zucas on 29 December 2007
A game has legs if it doesn't show traditional drops. Here are signs of that:
1. Sales more than it did in its launch week.
2. Levels off at a respectable weekly sales units, normally above 15k, but dependent on territory.
3. Increases vastly during holiday season.
The only way for a game to get legs is for the game to have mainstream appeal. When that happens the legs will always come through. That is why #1 is included. You'll notice with a lot of hardcore games that they'll sell big on the first week but that's it. From thereon after can't even pass what it did in the first week for the rest of its lifetime.
