Marketing is tough, it requires 100% hardwork, and your success is going to be based 70% on dumb luck. Unless you have a massive marketing budget behind you (which I am certain you don't) marketing really comes down to networking and planning ahead...way, way ahead.
I wish I could tell you the winning formula, but my last album wasn't exactly a chart topper, and the album before that one performed even worse. We don't talk about the music that I did before those albums (but I will say the Vocaloid community certainly liked them)
My current mission is just to try to get a few extra sales - not reaching for the stars, let alone the sky, just trying to reach for the hill in my backyard. My strategy has been to be active on Youtube.
As I discussed in my "
RPG Maker Has A Terrible Reputation" thread, RPG Maker
as a topic really is performing well on Youtube recently. And by "as a topic" I mean things that are discussing things surrounding the engine, but not necessarily things built in the engine. Talking about it's reputation, it's legacy & history, or even giving a commentary on your thoughts on the engine sort of fit this role. However, no one really cares about reviews, devlogs, or playthroughs of RPG Maker - so these types of content perform poorly.
You can use this strategy (as I have) to try to grow some ever green content and mix it in with devstreams & playthroughs (yes they underperform, but an active channel is better than a dead channel, so under-performing videos is better than no videos - at least for a small, growing channel) to hopefully grow some marginal interest in your game over time. I've been expiramenting over the past few months to see what drives the highest click-through impressions on my channel. Hard to make definitive answers right now, probably need another 2 months of data, but it seems like including "RPG Maker" in the title helps a bit. You can read the wrap-up (my last post) in the "RPG Maker Has A Terrible Reputation" thread for some insight on video performance (although the information is not up to date, some of the stats are performing even better than what my final report states)
I would keep a list of contacts of people you think might be interested too. Once release day hits - or even a week or so before - start emailing those folks. If you can't spend money directly, then you can "spend money" by giving away free copies. Give streamers & reviewers keys, host a give away on the forums or somewhere that might see it, and maybe go hang out in front of your local game store and harass strangers with your download code (I'm only slightly joking)
If you are interested, partnerships always benefits growth, as we can both mutually benefit from a partnership, so if you have ideas for RPG Maker or RPG game topics, I'd be willing to collaborate on a video. I hope to do one big video similar to "RPG Maker Has A Terrible Reputation" every 6 weeks or so. If you are interested let me know. I've been reaching out to other users about possible video ideas *cough*
@Arthran *cough* The production behind these things takes a long time, so the sooner we can start the better.