ToysRUs is giving away $20 gift card with the purchase of Halo:ODST. The game will cost $60 plus tax, so its a good idea to take advantage of this offer if you are planning to buy the game. Oh! ToysRUs is also giving away a free Halo ODST Rookie Action Figure too.
Of course with most promotion there will be a expiration date which for this offer from Toys R Us wiil be September 26. The offer for the gift card will be only available in store, but you can still get the free action figure online (just head to the store).