Characters gain experience and level up, with customizable ability improvements as in a traditional role-playing game. With interchangeable parts, thousands and thousands of different possible weapons are available in Borderlands, and a character's proficiency and accuracy chances rise with repeated use of a certain weapon type. Resources such as ammunition and cash are shared among the squad, but the weapons and armor pieces that drop from fallen enemies may be up for grabs. In some multiplayer modes, characters on the same team can duel one another for the right to claim gear from a slain monster.Designed for play on Internet-connected consoles and computers, the game features multiplayer combat with the four basic character archetypes in quick, online pick-up games. The high-def art style portrays eccentrically geared, slightly exaggerated human forms, in a land of rich, gritty textures, with a hint of an outline drawn around people and objects, for the appearance of a graphic novel come to life. Borderlands was developed by GearBox Software, the studio behind the brothers in arms World War II games, acclaimed for their realistic portrayal of squad combat and historical accuracy of weapons and vehicles in fine detail.The "Game of the Year Edition" includes Borderlands, a foldout map of Pandora, and the four previously released Borderlands add-on packs: The Zombie Island of Dr. Ned, Mad Moxxi's Underdome Riot, "The Secret Armory of General Knoxx," and "Claptrap's New Robot Revolution."