Amazon (orders ship free, or ship free with a combined total order of $25 or more):

Over 1000 items to choose from: Buy 1 video game or accessory, get 1 50% off - includes games and accessories for Wii, DS, 3DS, and other popular systems

Sale highlights (buy 1, get 1 50% off when sold by Amazon.com): Mario Kart Wii with wheel accessory (Wii, $49.99, free S&H), LEGO Harry Potter: Years 5-7 (Wii, $49.99, free S&H), Kirby's Mass Attack (DS, $29.99, free S&H), New Super Mario Bros. (DS, $34.96, free S&H), Mario vs. Donkey Kong: Mini-Land Mayhem! (DS, $28.17, free S&H), Super Scribblenauts (DS, $27.99, free S&H), Pokemon SoulSilver Version (DS, $37.70, free S&H), Pokemon HeartGold Version (DS, $38.19, free S&H), The Legend of Zelda: Ocarina of Time 3D (3DS, $39.99, free S&H), Star Fox 64 3D (3DS, $37.99, free S&H), LEGO Harry Potter: Years 5-7 (3DS, $38.99, free S&H), Cave Story 3D (3DS, $39.99, free S&H), Shinobi 3D (3DS, $39.95, free S&H)

19 days of video game deals: Day 8 - EA Sports Day - includes games for Wii and other popular systems

Includes Amazon exclusive hardcover art book: Rayman Origins (Wii, $45.98, free S&H) - part of Amazon's Buy 1, Get 1 50% off sale

3DS deals: Ridge Racer 3D (3DS, $16.96, 43% off), Bust-A-Move Universe (3DS, $9.99, 50% off), Asphalt 3D (3DS, $9.99, 50% off), Tom Clancy's Ghost Recon Shadow Wars (3DS, $15.96, 47% off)

Best Buy

$50 gift card with purchase of a 3DS system ($169.99, free S&H; available in Cosmo Black, Aqua Blue, Flame Red)

Super Monkey Ball 3D (3DS, $9.50, free S&H), No More Heroes 2: Desperate Struggle (Wii, $9.50, free S&H), Teenage Mutant Ninja Turtles: Smash-Up (Wii, $9.50, free S&H), Final Fantasy Crystal Chronicles: The Crystal Bearers (Wii, $9.50, free S&H), De Blob 2 (Wii, $9.50, free S&H), Kingdom Hearts: Re: Coded (DS, $14.50, free S&H), BlazBlue: Continuum Shift II (3DS, $14.50, free S&H), Professor Layton and the Unwound Future (DS, $19.50, free S&H), Dream Trigger (3DS, $9.50, free S&H), Thor: God of Thunder (DS, $9.50, free S&H), Okamiden (DS, $14.50, free S&H), Bust-A-Move Universe (3DS, $9.50, free S&H), Dragon Quest VI: Realms of Revelation (DS, $14.50, free S&H)

Games and accessories for $5.99 each; Games and accessories for $9.99 each

$20 gift card with the purchase of a Nintendo Wii with New Super Mario Bros. Wii/Mario soundtrack bundle ($149.99, free S&H; available in black)

Buy any 2 Games priced $29.99 and up, get 1 free (free S&H) - includes games for Wii, DS, 3DS and other popular systems

Walmart

2-For deals: 2-For-$30 Nintendo DS games with bonus game case, 2-For-$30 Nintendo DS games, 2-For-$20 Nintendo Wii games, 2-For-$30 Nintendo 3DS games, 2-For-$20 Nintendo DS games, 2-For-$30 Nintendo Wii games

Free Nintendo swag: Free Super Mario Bros. 25th Anniversary Limited Edition Cinch bag with purchase of Nintendo Selects game (Wii, $19.96, free site-to-store shipping)

Free site-to-store shipping: The Legendary Starfy (DS, $9.96 new), Lux-Pain (DS, $9.96 new), Fossil Fighters (DS, $9.96 new), Disney's A Christmas Carol (DS, $8.99 new), The Legend of Zelda: Spirit Tracks (DS, $17.96), Ridge Racer 3D (3DS, $16.96 new), Tom Clancy's Ghost Recon: Shadow Wars (3DS, $15.96 new)

Gamestop

Samus would approve: Metroid: Other M (Wii, $9.99 new)

Available for pre-order: Xenoblade Chronicles (Wii, $49.99, available 4/2/12)

$20 gift card with purchase: Special Edition Zelda Cosmo Black 3DS with The Legend of Zelda: Ocarina of Time 3D bundle ($199.99 new, online only)

Discounts and offers: Free shipping on game and accessory orders of $20 or more, DJ Hero 2 with turntable bundle (Wii, $14.99 new, save $11.00), DJ Hero 2 Party Bundle (Wii, $24.99 new, save $35.00, includes game, two turntables and microphone)

3DS bundles: Flame Red 3DS with Super Mario 3D Land bundle ($199.99 new), Pearl Pink Nintendo 3DS with Nintendogs + Cats: French Bulldog & New Friends ($169.99 new)

Coupons: Coupon code HAPPY to save $20 off your in-stock purchase of $149.99 or more (excludes systems and gift cards); Coupon code MERRY to save $15 off your in-stock purchase of $99.99 or more (excludes systems and gift cards); Coupon code 20ACC for 20% off in-stock accessories (excludes points, time cards, and select PC accessories). Coupons expire December 14th.

Other retailers:

NewEgg: Conduit 2 (Wii, $14.99, free S&H), Gardening Mama (DS, $14.99, free S&H), Raving Rabbids: Travel in Time (Wii, $14.99, free S&H), more Wii games, more DS games, 3DS games

Kmart, in-store: $15 gaming coupon with the purchase of Mario Kart 7 (3DS, $39.99), $30 gaming coupon with the purchase of a 3DS system ($169.99), $50 gaming coupon with the purchase of a Wii system ($149.99) - free Shop Your Way Rewards membership required for gaming coupon offers; $10 off any 3DS game priced $29.99 or above (excluding Mario Kart 7 and Super Mario 3D Land); Skylanders: Spyro's Adventure Starter Pack (Wii, $59.99)

Toys R Us: Buy 1, Get 1 Free on select video games, Free Mario Bobblehead stylus with any DSi or DSi XL system purchase; Free Ultra sensor bar with the purchase of any Wii system; Buy 1, Get 1 50% off on K'Nex Mario Kart building sets; Buy 1, Get 1 50% off on Mega Bloks Need For Speed building sets; Buy 1, Get 1 50% off on all video games and accessories; $40 gift card and free Mario bobblehead stylus with Nintendo 3DS base system ($169.99; available in Aqua Blue, Flame Red, Cosmo Black) or Rose Metallic Nintendo 3DS system with Nintendogs + Cats bundle ($169.99, in-store only); $40 gift card and Super Mario stylus 4-pack with the purchase of a Flame Red 3DS with Super Mario 3D Land bundle ($199.99, in-store only)

Target: Online only, 3DS system with Mario Kart 7 bundle - includes system, game, Mario Kart Snap & Go Kit ($189.99, save $35.00). Available in Flame Red, Aqua Blue, Cosmo Black; Online and in-store, $20 gift card with the purchase of a black Nintendo Wii with New Super Mario Bros. Wii/Mario soundtrack bundle ($149.99); In-store, Free Skylanders character ($7.99 value) with purchase of a Skylanders: Spyro's Adventure Starter Pack ($69.99)