An obby is an obstacle course. You jump, climb, and dodge your way through a series of stages, usually with checkpoints along the way, until you reach the end. They range from short beginner courses to towers with hundreds of stages.

Depends on how much of a challenge you want. The collections above include trending obby and platformer games, fast parkour courses, platformers with checkpoints and boss stages, and easier obbies if you're just starting out.

Almost all of them. Roblox is free to download and play, and the vast majority of obby and platformer games are free to jump into. Some games may require a one-time paid access fee, and many offer optional in-game purchases.

There's a lot of overlap. On Roblox, "obby" usually means a 3D obstacle course you run through one stage after another. "Platformer" is a broader term for jumping games, including ones built around levels, bosses, or side-scrolling. Either way, it comes down to timing your jumps.

Yes. Most obby games on Roblox are multiplayer, so you can join a friend's server and race each other to the end, or help each other make it through.