The game most often called the first Roblox game is Classic: Rocket Arena, originally known as Rocket Arena. It dates back to January 2006, before Roblox officially launched.
There is one catch: it is better described as the oldest well-known Roblox game that still survives. Developers used other test places while building Roblox, and some of those were deleted or never released publicly.
What was Rocket Arena?
Rocket Arena was a simple fighting game. Players used rockets in a brick arena, knocking apart parts of the map while trying to defeat one another.
It looks basic next to a modern Roblox release, but it demonstrated physics, multiplayer servers and destructible building pieces. Those were important parts of early Roblox.
Why the answer is disputed
A platform needs test worlds before it opens. Roblox staff created places to check characters, tools and physics, and not every early file has a clear public date.
The word game also changed meaning. A small testing place from 2004 might be older than Rocket Arena, but it was not necessarily a finished public game that players could discover.
Can you still visit it?
Versions of the classic arena have been preserved on Roblox. Features may not behave exactly as they did in 2006 because the Roblox engine has changed many times since then.
It is still a useful look at how far the platform has moved. Early Roblox games were often small experiments, not enormous worlds with years of updates.