Three years ago, gamers were treated to an ambitious title that appealed to fans of first-person shooters, lootfests and RPGs alike. Its sequel would have been a step up (and a multimillion seller, assuredly) even if Gearbox only expanded upon the narrative.

Instead of taking the easy route, the studio has taken everything that impressed in the original and greatly enhanced it. From major bullet points such as the story to smaller details such as the UI and inventory system, "Borderlands 2" surpassed my expectations and stands as a prime example of how to knock a sequel out of the park.

Unlike the first game, players have a very specific enemy in mind as they shoot their way across Pandora. Handsome Jack has taken credit for the original vault hunters' actions, and has tapped into a vast supply of the valuable element Eridium in his rise to power as leader of the Hyperion corporation and dictator of Pandora. When a new set of vault hunters catches wind of his ultimate plans for the planet, they set out to reunite with familiar faces and put an end to Jack's reign. With an entertaining antagonist, some surprising twists and cut-scenes you actually want to watch, the story is one of the many significant steps up from its predecessor.

The new classes are vaguely similar to classes from the original game, but their abilities and skill trees make them uniformly superior. My playthrough was a blast as Zer0, the robotic ninja with the ability to cloak himself and deal massive damage with sniper rifles and his sword. "Borderlands 2" utilizes the same user-friendly co-op framework as the first game; experimenting with the classes' unique abilities in tandem is rewarding. Having four distinct classes allows for a variety of gameplay experiences, but the replayability doesn't stop there. Each class has three distinct skill trees to explore, and your playstyle can vary wildly depending on how you choose to distribute skill points.

We didn't get much of a chance to learn about the vault hunters during the first game, but by taking Roland, Brick, Lilith and Mordecai out of the players' hands, Gearbox has freed itself to do more with the characters. They return to help the new crew, and they're just a few of the many colorful characters that assign quests. Fetch quest missions and generic objectives are rare in "Borderlands 2," as even seemingly inconsequential side quests have plenty of entertainment value. Throughout the game, the dialogue and clever missions display a sense of humor on par with the best in the industry.

While the new classes and focused narrative are the marquee bullet points when it comes to this sequel's improvements, that's barely scratching the surface of the multitude of smaller upgrades. Inventory management and the user interface are much better. Character customization allows players to alter their classes with different heads and skins. A new token system rewards players for completing challenges by granting stat bonuses that carry over to any character on the same profile. Enemy characters are more varied.

All of the improvements would make for a standout title even if it were constricted to single-player. Considering Gearbox has continued to put this franchise in a league of its own when it comes to co-op, it elevates the game to something more.

With its unmatched co-op gameplay, intense shootouts, addictive loot collecting, expansive skill customization, hilarious dialogue and insane level of replayability, "Borderlands 2" is one of the most rewarding gaming experiences of this console generation.

BORDERLANDS 2

four out of four stars Publisher: 2K Games. Platform: Playstation 3, Xbox 360 and PC. Price: $60. Rating: Mature.