There are actually game developers here using the tag #gamedev long before you. Please share your work in that tag. The gamedev community here is very small though.
There's also @utopian-io, it's a website built on STEEM for all open source project, if your game is open source and has a github page, you'll get a huge amount of support there.
I upvoted your post~
Yeah, I did notice a bit after posting that there actually are posts in this tag.. It just didn't really seem like it since it's not in the actual list of tags. Hopefully we can make it big enough to show up.
Most tags aren't in that list... Glad you found it.