Getting the Platinum Trophy and all achievements in Grand Theft Auto 5 is a comprehensive and time-consuming process that requires dedication across both the single-player story and GTA Online modes. The Platinum Trophy, known as "Lost Santos Legend," is awarded only after unlocking every other trophy in the game, including all story, side missions, collectibles, and online achievements.

Key Steps and Tips for Earning the Platinum Trophy:
1.Complete the Story Missions: Progress through all main story missions. This unlocks many foundational trophies such as "To Live or Die in Los Santos" and mission-specific trophies like "Diamond Hard" and "Subversive" for heists.
2.Achieve 100% Game Completion:This involves completing all side missions, hobbies, and pastimes, including Strangers and Freaks missions, stunt jumps, knife flights, and collectibles like spaceship parts and nuclear waste.
3.Purchase Properties and Complete Associated Activities:Buying properties like the Downtown Cab Co. and McKenzie Field Hangar unlocks unique trophies such as "All’s Fare in Love and War"and "TP Industries Arms Race".
4.Stock Market and Investments: Some trophies require financial acumen, such as "A Lot of Cheddar," which involves spending $200 million across characters, and "Trading Pure Alpha," which requires making a profit in the stock market.
5.Online Trophies:To unlock the Platinum Trophy, players must also earn all 17 GTA Online trophies, which include reaching certain ranks, completing jobs, and participating in various multiplayer activities.
6.Avoid Missing Trophies:Some trophies are missable, such as the special cab fares. Declining all special fares can make the trophy unobtainable without reloading a save. Careful tracking and using guides can prevent such issues.

Additional Advice:
1.Use detailed trophy guides and checklists to track progress and avoid missing collectibles or side missions.
2.Delay certain missions, like Lester’s assassination missions, to optimize stock market profits.
3.For online trophies, consider joining crews or communities to facilitate completing multiplayer challenges.
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