Unofficial guide for rng dev's rail obby. Not a playtest.
Start a Grapple Cart Obby run
[1 & 2 PLAYER] Grapple Cart Obby puts you in a wooden cart on a rail. The control guide updated Sep 27, 2026 says you do not jump the course: you steer, brake, and fire an orange grapple at marked targets. Official Roblox text does not describe that loop. The games API description was null on 2026-10-02.
Which pad starts a solo run or a shared cart?
The same control guide says the lobby has colored queue pads. Step on the green 1 PLAYER pad for a solo cart. The 2 PLAYER pad creates a cart you share. If you have not bought a pass, the guide says you board the free wooden starter.
In a shared cart, the guide's advice is to split the jobs: one player steers and the other fires the grapple. Trying to drive and hook at the same time is called a common way to leave the rail. That split is guide advice, not something this site confirmed in a server.
Which four inputs does the HUD list first?
| Input | Action in the control guide |
|---|---|
| E | Fire the grapple hook |
| Space | Brake |
| A, D, or mouse | Steer |
| R | Reset the character and cart |
Repair, Skip Stage, and pushing another cart sit on other buttons. Those prices and labels are on the controls page.