Quick Answer
To start the Diamond Casino Heist in GTA Online, you must first own a high-end apartment (e.g., Eclipse Towers), then visit the Casino to trigger a cutscene with Ms. Baker. After that, purchase an Arcade property (e.g., Videogeddon or Pixel Pete’s) from the Maze Bank Foreclosures website for at least $1.8 million. Once you own an Arcade, Lester Crest will contact you to begin the heist setup missions from the planning board inside your Arcade. Note that this is a fictional in-game activity and has no connection to real-world gambling or Australian online casino laws.
Detailed Step-by-Step Guide to Starting the Diamond Casino Heist
Prerequisites
Before you can launch the heist, you must meet these requirements in GTA Online:
- Character Level: You must be at least Rank 1 (no level restriction, but some missions require higher skills).
- High-End Apartment: Own any high-end apartment (e.g., Eclipse Towers, Del Perro Heights) to receive Lester’s initial invitation. This costs between $200,000 and $500,000.
- Arcade Property: Purchase an Arcade from the Maze Bank Foreclosures website on your in-game phone. Prices range from $1,785,000 (Pixel Pete’s) to $2,675,000 (Wonderful). The Arcade serves as your heist planning base.
- Casino Visit: Go to the Diamond Casino & Resort in-game. This triggers a cutscene where Ms. Baker introduces you to Lester’s plan.
Step 1: Purchase the Arcade
Open your in-game phone, go to the internet browser, select “Maze Bank Foreclosures,” and choose an Arcade. The cheapest option is Pixel Pete’s in Paleto Bay ($1,785,000), but it’s far from the casino. For convenience, buy the Videogeddon Arcade in La Mesa ($2,320,000) or the 8-Bit Arcade near Vinewood ($2,675,000). You must have sufficient funds in your Maze Bank account.
Step 2: Meet Lester at the Arcade
After purchasing, Lester will call you. Drive to your new Arcade. Inside, you’ll find a planning board. Interact with it to trigger the first heist mission: “The Diamond Casino Heist – Scope Out.” This begins the setup phase.
Step 3: Complete the Scope Out Mission
Lester will ask you to visit the Casino in a specific disguise (e.g., as a maintenance worker or security guard). Drive to the Casino, enter through the service entrance, and use your phone to take photos of key security points (e.g., vault doors, keycard readers, security cameras). This unlocks the heist planning options.
Step 4: Choose Your Approach
Back at the Arcade, use the planning board to select one of three approaches:
- The Big Con: Disguise yourself as staff or security to sneak in.
- Silent & Sneaky: Stealth-based infiltration with silenced weapons.
- Aggressive: Full frontal assault with heavy weaponry.
Each approach requires different prep missions (e.g., hacking devices, getaway vehicles, weapons).
Step 5: Complete Setup Missions
Lester will list required prep missions on the planning board. These include:
- Vault Keycards: Steal keycards from a courier or security truck.
- Hacking Device: Retrieve a hacking tool from a cargo ship or military base.
- Vehicle & Weapon Loadouts: Steal specific cars and weapons from various locations.
- Disguises (for Big Con): Acquire uniforms from a casino or police station.
You can do these missions solo or with up to 3 other players. Each prep mission costs time but no additional money beyond ammunition.
Step 6: Launch the Finale
Once all prep missions are marked as “Complete” on the planning board, Lester will allow you to launch the final heist. You need at least one other player (up to 4 total). Select “Finale” from the planning board, choose your crew (e.g., hacker, driver, gunner), and start the heist. Note that crew members take a cut of the final payout.
Important Gameplay Tips
- Arcade Upgrades: Purchase the Master Control Terminal (add-on) to manage all your businesses from the Arcade. This costs $1,450,000 but is optional.
- Heist Payout: The maximum take is around $3.6 million (depending on vault contents and difficulty). You keep 85% after crew cuts.
- Replayability: You can replay the heist by paying a $25,000 fee to Lester after completing it.
Relevance to Australian Laws (IGA 1997)
It is critical to distinguish GTA Online’s heist from real-world online gambling. The Diamond Casino Heist is a fictional, scripted mission within a video game rated MA15+ by the Australian Classification Board. It involves stealing virtual currency (GTA$) and does not involve real money betting, slot machines, or poker tables that could fall under the Interactive Gambling Act 1997 (IGA). However, Australian players should be aware that:
- No Real Gambling: The in-game casino (Diamond Casino & Resort) offers virtual poker, blackjack, and slot machines using GTA$, but this is not regulated by the IGA because it uses fake currency. The Australian Communications and Media Authority (ACMA) does not consider this “gambling” under the Act.
- Loot Boxes & Microtransactions: GTA Online sells Shark Cards (real money for GTA$) which can be used in the casino. The IGA does not directly regulate in-game purchases, but the Australian Senate has debated loot box reforms. As of 2025, no specific law prohibits buying GTA$ and using it in the virtual casino.
- Legal Advice: Always check the Australian Classification Board’s ratings and ensure you are over 18 (or 15 with parental guidance) to play MA15+ content. The heist itself is a game mechanic, not a gambling activity.
Key Takeaways for Australian Players
- Start the Heist: Own an Arcade ($1.8M+), complete the Scope Out mission, and finish all prep tasks before launching the finale.
- No Real Gambling: The Diamond Casino Heist is a fictional robbery, not a real casino game. The IGA 1997 does not apply to virtual currency transactions in GTA Online.
- Legal Compliance: Rockstar Games (publisher) complies with Australian classification laws. The game is rated MA15+ and does not promote real-world gambling.
- Safe Play: Never use third-party mods or real-money trading sites, as these violate Rockstar’s terms and may breach Australian consumer law.
- Time Investment: The heist takes 4-8 hours to prep and complete. It is a cooperative activity best enjoyed with friends.