Not 1889, but for Steampunk that deals with colonialism, take a look at Renegage Jennys and Boilerplate Jacks (and the StoryGames thread). It’s a steampunk game but told from the point of view of the colonised. It also draws on a lot of real-world events and locations from the 19th century. It’s only when you start looking around that you realised there was a lot more to the world than what the Europeans typically wrote about.
If I were to run another steampunk game, I’d start from the same position: the PCs aren’t the typical upper-class Europeans spreading Empire and Civilisation to the Natives. Instead, they’d be the people outside those power structures (for whatever reason), with their stories illustrating all the places where colonialism doesn’t come across as idyllic.
I ran a short playtest campaign of it at the local games club. That went really well, despite some speedbumps with the mechanics.
Unfortunately, Josh has realised that publishing the game would take more time, effort, and money than they want to invest, so there will be no further development on the game. If I were to run it again, I’d convert the mechanics to Cortex+ or Fate, but keep all the background and setting material, and probably the scenario/Port-of-Call format.