Stranger's Wrath HD wouldn't be considered a complete update without in-game gongs. Developer Just Add Water has posted a list of the game's Trophies and, as a pleasant bonus, a reminder that you get to foil the schemes of one "Fatty McBoomBoom."
According to an Oddworld representative posting in the comments, these Trophies should also become available on the Steam version of Stranger's Wrath, and any subsequent platform that supports achievements.
Oddworld: Stranger's Wrath HD is complete, according to the developers, and now awaits a final release date on PS3 and Vita. Talks with Microsoft regarding an Xbox 360 version are still ongoing.