This is the only career from The Sims base game never to appear in The Sims 2 or The Sims 3. However, the Adventurer career track from The Sims 2: Seasons is similar, and some promotion levels are basically the same jobs under different titles (e.g. "Relic Liberator" for "Treasure Hunter", "International Sim of Mystery" for "International Spy", etc.). The adventure special opportunities in The Sims 3: World Adventures also re-create many aspects of the Xtreme career and with practice can potentially be used to earn a living, though they do not form an official career path or skill-career in the game, and can be costly to pursue to begin with.