Yes! The game will also be released on Steam. Whether you purchased it during the pre-order period or afterward on Itch/Gumroad, we'll send you a Steam key once it's available there. :D
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Yes, we do have plans to add achievements to Dik Journey!
Other people have also asked about achievements for it on Steam.
We'll add them when we have time—I’ve made a note about it.
You can also help by reminding us! Just add it to the feature requests in our Discord channel.
Whenever we have time, we focus on optimizing and adding features we can implement. :D