RollerCoaster Tycoon World rolled out a gameplay teaser trailer earlier this month and it landed with such a thud the game's creators are promising fans they will remake its visual style before release.

A blog post from Area 52 Games, the game's developers, promised that the graphics seen in the trailer were simply placeholders for a game in a "pre-alpha stage," implying they were holdovers from a game built on the Unity 4.6 engine. RollerCoaster Tycoon World will upgrade to the Unity 5.0 engine, they say, and the art will be replaced with visuals "to make it not only higher definition, but more believable/realistic overall.

"We know that today these words must ring hollow," admits Area 52, "but trust that we are doing everything we can to make the game look excellent."

Bottom line, "We will not release the game until we know that it is truly ready," Area 52 said, noting that it has been more than 10 years since the last full release in the RollerCoaster Tycoon series. RollerCoaster Tycoon World was announced last year for Windows PC with a release date pegged to "early 2015," but Area 52 now says it will "communicate on the expected release of RCTW later this year."

As for why they'd release a trailer of a game on an old engine with a visual style they planned to change, Area 52 said, "Our intention ... was to show that there is progress being made."

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