Roaring Forties is not available to play online
The Roaring Forties slot by Novomatic is a variation of it's fruits series games like Sizzling Hot Deluxe and Power Stars all of which can be found on both Gaminator machines in land-based casinos and at the online casinos listed on this page. This game differs from the others slightly in two respects: firstly, it has four symbols per reel and secondly, the wild symbos on the middle 3 reels are stacked as opposed to Power Star's expanding and sticky wilds.
The Roaring Forties slot appears mainly on Novostar machines found in South American countries although I have seen it on the UK's Novomatic Multi-Gaminator machines before now: just not very often. Along with Book Of Ra Deluxe and the aforementioned Sizzling Hot Deluxe, Roaring Forties is a very popular online game on the Latin American continent and has a cult following in Eastern Europe too.