Build Your Gym

Build Your Gym is a gym-building tycoon on Roblox developed by Your Gym Game, launched in December 2025, with 5.2 million visits, 127,300 favorites, and a 94.9% approval rating. Players open mystery boxes to get gym equipment, place machines on the gym floor to generate passive income, train on their own equipment to build a Muscle stat, and fight bosses to unlock rewards. The gym earns cash even while offline.

The loop combines tycoon passive income with gacha box-opening and RPG progression. Open boxes to get random equipment, place machines to earn Cash per minute, and use that Cash to buy more boxes for better equipment with higher income potential:

• 📦 Boxes - Gacha containers with random gym equipment inside; different tiers include Standard and Magma boxes
• 💰 Equipment placement - Every placed machine generates passive Cash; more and better machines equal higher income
• 🏋️ Muscle stat - Train on your own gym machines to build Muscle, which feeds into boss fights and unlocks
• ⏳ Offline earnings - The gym earns Cash while you are logged out; log in to collect and reinvest
• ⚔️ Boss fights - Defeat PvE bosses to unlock exclusive equipment tiers, new gym areas, and special rewards
• 🏠 Gym expansion - Purchase more gym floor space to place additional machines and raise the income ceiling

Magma Boxes are the higher-tier container with better equipment odds. Codes reward Magma Boxes directly, making code redemption especially valuable in the early and mid-game when accessing that tier through normal play takes time. The Cash-to-box loop compounds as better equipment generates more income to fund the next round of openings.

Build Your Gym combines gym theming with a familiar idle-tycoon formula. Players who enjoy the passive income model may also enjoy BUILD your Fish Pond, which applies the same idle-loop structure to fish hatching and pond decoration.