Extreme Cart Line

Extreme Cart Line is an idle simulation game on Roblox developed by Studio Inked, with 55.7 million visits and 4.75 million favorites since its September 2024 launch. The premise is deliberately absurdist: the core gameplay is waiting in a roller coaster queue, and the queue itself is the entire entertainment loop.

Players join a 50-person server and take their place in a roller coaster line that advances over time. While waiting, the game earns you XP automatically at 1 XP per second, with a significantly higher rate once you enter the park itself:

• ⏳ XP accumulates every second you stand in the queue
• 🏠 Inside the park the XP rate rises to 10-100 times the standard rate
• 💰 Spend XP on upgrades that improve the waiting experience
• 🎭 The destination reward is a ride on the craziest roller coaster in Roblox

The 50-player server cap creates authentic queue density and social atmosphere, making the wait feel genuinely communal. Roblox Premium members earn 50% more XP throughout the entire experience, accelerating both the queue and park phases.

The format inherits its concept from Bathroom Line Simulator, which the developer credits directly, and translates the absurdist wait-as-gameplay idea into a theme park context. A full park expansion with additional rides has been announced, making the current game a foundation for a larger planned experience.