Have u even tried it?
Its definitely a game creation platform.
It can be categorized as unity meets steam.
Its main age range goes from 7-18.
Its secondary age range goes above 18+.
I has its own asset store.
This is the engine!
You can write scripts in it!
This is Half Life 2 in Roblox :
https://www.roblox.com/games/4660272935/Half-Blox-2
And for the record, Core copied what Roblox is doing while Core is made around this time and Roblox was made in 2006. But for some damn reason , Roblox is looked down upon while Core is considered "something better", even though it lacks mesh importing which is one of the main reasons I use Roblox as compared to Core. A game dev platform gives you a tool with free multiplayer and free API server hosting stuff and a chance to make millions through developing as an indie and then its looked down upon. I heard right, the devs at Roblox appreciate their fellow developers more than the developers of the non-roblox community!
What else should i show to tell you guys that roblox is a legit game engine?!?