God, this is such a mess, albeit one I put a lot of thought into. Instead of going for a "Top 25", I dedicated this list to above average games that shaped my general tastes in gameplay, world settings, etc.; something you can use as reference for the kind of media I tend to lean towards, even those not related to video games.
Basically, all of the games listed here have their own place in defining my tastes in some shape or form, which is also why I didn't list more than one games per series, an exception made for PMD, cuz it really did hold an impactful significance for me twice, for different reasons both times. In that sense, these are quite literally games to "know me".
For example, you can see Stormwinds right there as both my personal introduction to steampunk, as well as the lovely late 2000s flash games era that most of us probably have a soft spot for. One more example, Opoona's master class in that Synth-Extraterrestial aesthetic I go back to from time to time, even if I have a feeling the game itself won't age well upon me revisiting it; the significance in that area is eternal, that last part goes for the other games listed here too!
Since this is Cohost, you can easily find more non-spoiler details about what I like about some of these games through one of my pinned messages. Got any memorable games you'd like to share? ;)
(And before anyone asks, World of Warcraft is as in, before it went downhill; I'm well aware of its problems these days)