That sounds like Unreal. Unity has a free version and a pro version, the latter is either a subscription-based one, or a one-off payment of $1500 or similar, which does sound awfully cheap to me.
They've had a bit of capability difference before. From the version 5, they've changed their model so aside from mandatory Personal Edition splash screen, the engine is identical but they do offer support and external feature for their paid version. (And they have $100000 revenue/funding limit to license Personal Edition.[1])