If it's a base-game - activate that straight from UPlay's "Redeem" option from it's main menu. Click the gear in the upper-right hand corner; then go for "Activate A Key".
Though, If it's a DLC-key for a UPlay-game - those don't work from the main UPlay screen normally. Those often only work while in-game and selecting whatever their "Add DLC" section is from the game's main-menu, like say is the case w/ FC3 + AC4.
EDIT:
That key's format looks like the correct UPlay format for base-games/DLC's with XXX-XXXX-XXXX-XXXX-XXXX.
I have a lot of keys from them that are using that format - ACB, ACR, ACR DLC's, AC3, AC4, AC4: Freedom Cry DLC, Watch Dogs, etc.
Assassin's Creed: Unity (NA and EU available) Uplay code $32
Far Cry 4 (NA and EU available) Uplay code $32
The Crew (NA and EU available) Uplay code $32
*Very low stock
**Also have Brazilian VPN activated codes for $25 each
[SIZE=10.5pt]Borderlands: The Pre-Sequel Steam code Region Free $30[/SIZE]
Watch Dogs Uplay promo codes (North American Only) for $10 Amazon GC (preferred) or PayPal Gift
AMD Silver codes $18
[SIZE=10.5pt]Alien: Isolation Digital Deluxe Edition Preorder (Includes: Alien Isolation + Season Pass + Deluxe Edition DLC + Last Survivor DLC + Crew Expendable DLC + Corporate Lockdown DLC) $35[/SIZE]
[SIZE=10.5pt]Call of Duty®: Black Ops II Digital Deluxe Edition (includes COD WAW and other bonuses) $35[/SIZE]
[SIZE=10.5pt]Evolve Preorder $35[/SIZE]
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[SIZE=10.5pt]Want:[/SIZE]
[SIZE=10.5pt][/SIZE]
[SIZE=10.5pt]PayPal [/SIZE]
[SIZE=10.5pt] [/SIZE]
[SIZE=10.5pt]All games are Steam tradable gifts unless otherwise noted.[/SIZE]
[SIZE=10.5pt]All games are US/EU region free[/SIZE]
If anyone has Bionic Heart 2 from the Indie Gala bundle or a copy of the first Return to Mysterious Island from any of the bundles it's been in I'd pay Paypal for them.
Section 1 - URGENT LIST -> GAMES ON SALE IN CURRENT PROMOS:
Specific Versions WANTED are Listed below:
A. GROUPEES - Bundle in a Box 2 -> All Steam keys:
Experience 112 (AKA The Experiment)
Section 2 - CURRENT MOST WANTED LIST For Modern Titles: Specific Versions WANTED are Listed in this List:
Dragon Age: Inquisition -> Origin Version.
Final Fantasy XIII-2 -> Steam version.
Dreamfall Chapters -> Steam Version; GOG Version; OR Humble Bundle (HB has both Steam + DRM-FREE versions).
Shadowrun Returns: Dragonfall (DLC Version) -> Steam Version; OR DRM-FREE Version from Humble Bundle.
Shadowrun: Dragonfall (stand-alone version) -> Steam Version; GOG Version; OR DRM-FREE from Humble.
Section 3 - Steam Versions OR GOG Versions ARE accepted in the list below:
Tales of Monkey Island
Myst: Masterpiece Edition
RealMyst
RealMyst: Masterpiece Edition (this is only on Steam)
Myst V: End of Ages - Limited Edition
Dreamfall: The Longest Journey
Long Live The Queen
Spellforce 2: Faith in Destiny (base-game)
Spellforce 2: Demons of the Past
Spellforce Complete Pack [inc. from Spellforce 1 Platinum up to Spellforce 2: Demons of The Past]
DARK (base-game)
DARK: Cult of the Dead DLC
Thief II: The Metal Age
Tier 2 of the Sega Weekly Humble Bundle
Typing of the Dead: Overkill
Renegade Ops
SafeCracker
Jack Keane 1
Jack Keane 2
Dark Fall 1: The Journal
Dark Fall 2: Lights Out
Section 5 - GOG Versions ONLY are accepted in the list below:
Neverwinter Nights 2: Complete Edition
Ultima Underworld 1 + 2
Ultima 1+2+3 pack
Ultima 4+5+6 pack
Ultima 8: Gold
Ultima 9: Ascension
Dungeon Keeper 2
SimCity 2000: Special Edition
Thief: Deadly Shadows (AKA Thief 3)
Gothic 2: Gold Edition
Dark Fall: The Journal
Jack Keane 2: The Fire Within
Full Spectrum Warrior: Ten Hammers
Full Spectrum Warrior (original game)
Freedom Force vs. The Third Reich
Medal of Honor: Allied Assault - War Chest
Betrayal At Krondor Pack
Omerta (base-game)
Pirates! Gold Plus
The Interstate '76 Arsenal
Atlantis: The Lost Tales
Amerzone: The Explorer Legacy
STALKER: Shadow of Chernobyl
STALKER: Call of Pripyat
Section 6 - UPlay Versions ONLY wanted in this list:
[Place-holder]
Additional & Other Info for WANTS: See my Steam WishList -> Click me!
And/or make me an offer.
And/or just give me stuff for the heck of it, if you feel so inclined.
Section 1 - All GOG-versions listed below:
Torchlight 1
Section 2 - All Steam-versions listed below:
Return to Mysterious Island 2
Penguins Arena: Sedna's World
Street Racing Syndicate
Little Racers Street
Mini Motor Racing EVO
Indie Gala Friday Special #7 bundle (Cognition: Season 1, Face Noir, Jets N Guns Gold, Power Up, etc)
Jets N Guns Gold
Power Up
Nuclear Dawn
Summoner
Thief: Gold Edition
The Bureau: XCOM Declassified
Sid Meier’s Ace Patrol (Original)
Sid Meier’s Ace Patrol: Pacific Skies
Darkness 2
Medal of Honor (2010)
Zeno Clash
On the Rain-Slick Precipice of Darkness, Episode One
On the Rain-Slick Precipice of Darkness, Episode Two
Civilization 5
Death to Spies: Gold Edition (Side Note - Any EA games listed for Steam-version here, after doing the download via Steam - you might want to check the Registry & see if there's an Origin-key in there also for extra Origin-version activation purposes.)
Section 3 - All Origin-versions of games listed below:
Dead Space 1
Burnout Paradise
Crysis 2: Maximum Edition
Medal of Honor (2010)
Mirror's Edge
C&C: Red Alert 3 - Uprising [stand-alone]
Steam Sega Keys ($12 for all Sega games listed, not interested in selling separately)
Sonic 1
Sonic 2
Sonic Spinball
Sonic CD
Sonic Advenutre DX
Sonic 3D Blast
Sonic 3 & Knuckles
Renegade Ops
-Reinforcement Pack
-Coldstrike Campaign
Jet Set Radio
Hell Yeah
-Pimp my Rabbit
-Virtual Rabbit Missions