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Collection: NES Upgrades

Enhance your classic gaming experience with our NES Upgrades collection. At CastleMania Games, we offer a curated selection of premium accessories and games designed to elevate your Nintendo Entertainment System. Rediscover the joy of retro gaming with enhanced reliability and superior gameplay.

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31 products

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NES (Nintendo Entertainment System) (28 products)
SNES (Super Nintendo) (4 products)
Game Boy/ Game Boy Color (1 product)
Game Boy Advance (1 product)
Sega Genesis (1 product)

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Cartridge Adapters (1 product)
Consoles (3 products)
Controllers (3 products)
Controller Adapters (2 products)
Development and Testing (2 products)
Game (11 products)
Replacement Housing (1 product)

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NES (Nintendo Entertainment System) (28 products)
SNES (Super Nintendo) (4 products)
Game Boy/ Game Boy Color (1 products)
Game Boy Advance (1 products)
Sega Genesis (1 products)

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Cartridge Adapters (1 products)
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31 products

RetroN 1 HD Gaming Console for the NES

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RetroN 1 HD Gaming Console for the NES

Regular price $34.99 USD

Regular price ~~$39.99 USD~~ Sale price $34.99 USD
Unit price per

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Retro-Bit Origin8 2.4 GHz Wireless Controller

Retro-Bit Origin8 2.4 GHz Wireless Controller

Regular price $24.99 USD

Sale price $24.99 USD
Unit price per
Retro Game Restore NES Replacement Housings

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Retro Game Restore NES Replacement Housings

Regular price $119.99 USD

Sale price $119.99 USD
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RetroTime NES HUB Bluetooth for NES

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RetroTime NES HUB Bluetooth for NES

Regular price $59.99 USD

Sale price $59.99 USD
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RetroTime SNES Add-On Adapter for NES HUB

Sale

RetroTime SNES Add-On Adapter for NES HUB

Regular price $20.00 USD

Regular price ~~$29.99 USD~~ Sale price $20.00 USD
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Sale
Cadet Premium BT Controller - NES

Sale

Cadet Premium BT Controller - NES

Regular price $22.00 USD

Regular price ~~$32.99 USD~~ Sale price $22.00 USD
Unit price per

Sale
R.C. Pro-Am II- NES® - Collector’s Edition

Sale

R.C. Pro-Am II- NES® - Collector’s Edition

Regular price $49.99 USD

Regular price ~~$59.99 USD~~ Sale price $49.99 USD
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Battletoads & Double Dragon (NES)

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Battletoads & Double Dragon (NES)

Regular price $59.99 USD

Sale price $59.99 USD
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Rod Land - Collector’s Edition for NES®

Sale

Rod Land - Collector’s Edition for NES®

Regular price $45.00 USD

Regular price ~~$59.99 USD~~ Sale price $45.00 USD
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Hammerin’ Harry - Concrete Collection

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Hammerin’ Harry - Concrete Collection

Regular price $99.99 USD

Sale price $99.99 USD
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Hammerin’ Harry Collector's Edition

Hammerin’ Harry Collector's Edition

Regular price $59.99 USD

Sale price $59.99 USD
Unit price per
Hammerin’ Harry 2: Dan the Red Strikes Back Collector's Edition

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Hammerin’ Harry 2: Dan the Red Strikes Back Collector's Edition

Regular price $45.00 USD

Regular price ~~$59.99 USD~~ Sale price $45.00 USD
Unit price per

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Little Medusa - Complete In Box With Manual (SNES)

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Little Medusa - Complete In Box With Manual (SNES)

Regular price $59.99 USD

Sale price $59.99 USD
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REKNUM - Complete In Box With Manual (NES)

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REKNUM - Complete In Box With Manual (NES)

Regular price $59.99 USD

Sale price $59.99 USD
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Project Blue - Complete In Box With Manual (NES)

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Project Blue - Complete In Box With Manual (NES)

Regular price $59.99 USD

Sale price $59.99 USD
Unit price per

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MultiDude - Complete In Box With Manual (NES)

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MultiDude - Complete In Box With Manual (NES)

Regular price $59.99 USD

Sale price $59.99 USD
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Welcome to the Castle!

Founded by lifelong gamers and collectors, it is our mission is to help you bring your favorite retro consoles out of the closet and attic (don't keep your games in the attic) and deliver modern quality of life improvements where we can.

Unlike mass-market platforms and big-box retailers, CastleMania is proudly boutique. Every product is carefully selected, every order matters, and every customer is part of a growing community who knows that authenticity goes a long way.

We’re also trusted by the brands that make the best products in the business. CastleMania Games is an authorized retailer for HD Retrovision, EON, Retro-Bit, Retro-Time Hyperkin and more. Our catalog is packed with solutions you can count on, and our support team is made up of real people who speak your language: scanlines, RGB mods, and CRT vs HDMI debates included.

(844) 994-2637
support@castlemaniagames.com
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