Topic on User talk:Cptmold
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The best way to handle ScummVM support would be just a small blurb under Key points mentioning said support. The King's Quest articles are a good example of how to denote the support, along with the relevant information.
As for the key points stuff, keep in mind that some articles have not been patrolled and edited since the Editing guide became official. For the longest time, there were no defined rules on what made a good key point.
Better examples of good key points can generally be found in more frequently updated articles.