GMG divides the deals by six pumpkin images. Each is a page of deals. We'll list everything worth checking out below:
No threshold (works on games under $7! Works nearly site-wide with a few exceptions like Civilization: Beyond Earth. Coupon does not stack with GMG Credit. Appears to work in all region.
Coupon X22OFF-DEALZO-NGMGUS is no longer valid, use the new coupon above.
Coupon/voucher has a $10 threshold. It works on most titles sitewide, though it does exclude select pre-order titles, notably titles from EA. Works in all region, including the UK or EU.
Clicking Get Deal will open you up to a menu of 10 Indie categories:
Clicking on one of those will open up a hoard of discount Indie games matching the selected genre.