Borderlands 1, video game, release date, action RPG, first-person shooter, cel-shaded graphics, Pandora planet, Vault Hunters, cooperative gameplay, split-screen, loot system, diverse weapons, Skag creatures, Bandit enemies, Claptrap robot, desert landscape, abandoned structures, sci-fi, dynamic lighting, sunset ambiance, wide-angle shot, 2009 release, gritty texture, exaggerated proportions, vibrant color palette.