The game features the ability to explore the in-game world, and complete both main missions and optional side quests, either in single-player or online cooperative gameplay, with the latter providing additional options for duels and competitive PVP matches in designated areas. Gameplay features include access to various weapons and shields that vary in type and statistics, weapons with special elemental functions, each playable character having distinctive class types and unique abilities for combat, upgradable skills, and the use of two-person vehicles. The game itself is rendered in cartoon-style, cel-shaded graphics, to provide greater detail on weapons and environments, and was inspired by various action role-playing games of the time, such as Ultima and Diablo.
Players start the game with the ability to equip two weapons but later gain up to four weapon slots, as well as slots for an energy shield, a grenade modification, and a class modification. Items collected can be sold back at vendors for money that then can be used to buy better items. One of the key features of Borderlands is the randomly generated weapons and items created either as dropped by enemies, found in storage chests about the game, on the ground, sold at vendors in the game, or as quest reward items. The game uses a “Procedural Content Creation System
When in combat, the player can take damage if their shield is depleted, affecting their health. If they lose all their health, they must either wait to be revived by another player or attempt to kill an enemy to achieve a “second wind”, or otherwise will be regenerated back at the last “New-U” station that they passed, losing a ‘ratio-appropriate’ percentage of their money in the process. Players quickly gain access to two-passenger vehicles, and can engage in vehicular combat with other enemies. Eventually, a system of fast transit points between the game world is available to the player; until then, players must walk or drive between areas to get around.
