In UFC Undisputed 2010's Career Mode, players create their own fighter, choosing their appearance, fighting style, and attributes. The goal is to guide your fighter from obscurity to becoming a UFC champion. The journey involves training, fighting, and managing your fighter's attributes and finances. As you progress, you'll face various opponents, each with their strengths and weaknesses. The mode offers a deep and engaging experience, simulating the highs and lows of a real fighter's career.