The Legend of Zelda: A Link to the Past was my first RPG. Or, if we're excluding RPGs that don't have rigorous leveling systems (which seems like a silly criterion of exclusion)
While I agree that a leveling system is poor criteria for RPGs, what would you consider to be the defining element?
Could we consider Metroid to be an RPG? One does, after all, take on the role of Samus as she explores an alien world, very similar in mechanics to what Link goes through in that classic SNES game. Or if social interactions are necessary, then would Metroid Fusion count, given that it is very similar in basic design to the earlier Zelda games? What about Harvest Moon? Is it an RPG or a farming simulator (or do those even have to be separate genres)?
Heh. Leave it to you to ask. I was wondering, actually, if you would. It's a good question. I offer the obligatory disclaimer is that there is no widely-agreed upon, highly-specific definition of an RPG (especially as pertains to video games). The term flourishes in the absence of other, more dominant genre qualifiers. Zelda, for instance, is sometimes disqualified from being an RPG because of its supposed "adventure" aspect, which is just as silly as disqualifying it on the grounds that it lacks a rigorous leveling system. (Zelda, by the way, does have a leveling system, in that Link can typically grow in sword power, armor power, magic power, storage power, etc. It's simply not as rigorous as a system as that of, say, Chrono Trigger.) Metroid is rarely classified as an RPG for the same reasons: With the classic games (and Fusion) you'll hear genre words like "action," "puzzle," and "platform," and with the Prime trilogy of course there was the "shooter" angle. Tiger Woods Golf is thought of as a sports genre game. Blah, blah, blah. You get the point. The conventional wisdom seems to be that games are not RPGs when they can be put into other genres instead.
Disclaimer duly noted, my take is that "roleplaying" is a deceptive term and doesn't conceptually fit as a genre or even a genre group. Most video games which we think of as RPGs are heroic fantasies, set in the fantasy or sci-fi genres, involving an epic plotline, battles with villains and monsters, and a strong component of interaction and exploration. Their genre would more accurately be called...well...not so fast. It turns out that, to come up with a good name, we have some work ahead of us in terms of defining the scope of video game genres generally and of this genre in particular.
Video game genres are, variously, inconsistent, contradictory, overlapping, irrelevant, and unrepresentative. The "puzzle" genre is so named because the point of those games is to solve a puzzle, but "puzzle" tells you extremely little about what a puzzle video game will actually be like when you play it. In contrast, the "platform" genre title tells you right away about something that will be common to the gameplay experience of all platformers: skilled jumping. However, it tells you nothing about what content these games might entail. You can see that the concept of a genre between puzzle and platform games is fundamentally different: The puzzle "genre" refers to conceptual content; the platform "genre" refers to mechanical gameplay.
As a game designer, I find "a game where jumping is the central focus" to be much more useful a description than "a game where solving puzzles is the central focus." If it were up to me, all video game genres would be named at least in part according to their gameplay. The main problem with doing it that way and
only that way is that the conceptual and mechanical grouping schemes don't overlap well. A platformer may have content all across the spectrum of literary genres, from comedy to horror. And we see that: The platform genre is probably the biggest of all video game genres, and includes many games that, beyond jumping, have nothing in common. A puzzle game, however, can take countless forms, because a puzzle itself can be almost anything which involves problem-solving. There simply can be no common gameplay element, and so we would get innumerable tiny genres, and people looking for an umbrella term like "puzzle" would be shit outta luck.
For another example, consider the sports genre. Like the puzzle genre, the name "sports" doesn't tell you anything about what the gameplay will be like. However, because the sports genre is modeled on actual sports, the gameplay of sports video games is led along somewhat by the real thing. If I buy a "baseball" game, then, unless the programmers were all smoking weed, I can reasonably imagine what playing the game might entail: There will be an interface for me to swing my bat, catch balls, throw balls, run around, and so forth. "Sports" is therefore a fairly decent genre title, because it not only describes the content, but, by a fluke, it also hints at the gameplay.
The RPG genre is somewhat similar in that regard, but not to the point where the genre title is in any way justifiable on these grounds--which is why I used the sports genre as my lead example of a genre title that captures both content and gameplay in a fairly decent way. In an RPG, the conceptual elements do give you a few hints about what the gameplay might entail...but only a few, and, as you will presently appreciate, these hints are not informative enough to be truly descriptive. I've already told you the conceptual content elements of RPGs. Their main
gameplay focus is on tactical combat encounters, which are expressed through "skills" (such as magic or swordplay) whose parameters are defined by a small base of ability statistics which are gradually improved over the course of gameplay. Their secondary gameplay focuses are on menu navigation, dialogue, and travel. Slap a rudimentary currency system on top and you've got almost every RPG there ever was.
I think you can understand now why I wasn't able to simply re-title the RPG genre and be done with it. The sports genre does a fairly good job of capturing both content and gameplay in the name "sports," but most video game genres don't. The RPG genre is one of them. If I were to rename the RPG genre in terms of the gameplay which is common to games now thought of as RPGs, the genre would be blown wide open because the gameplay elements would no longer be confined by the much narrower set of conceptual elements. The fantasy or sci-fi setting is not required at all. The heroic aspect is not required. The exploration-through-travel aspect is not required. The presence of magic or swords or mecha is not required. Currency is not required. What I'm getting at is that, by its emphasis on the content side of the equation, the name "RPG" as a genre title has held the genre to a very narrow domain, much narrower than can be plausibly accommodated by the gameplay.
Would broadening the genre by giving it a gameplay-based title be a good thing, or would people get frustrated when they go to look for heroic fantasies and have to pore over a much larger variety of games?
Let me switch directions for a moment: Consider the RPG and platform genres together. Conceptually, RPGs are remarkably similar to platform and adventure games (hence this remark), in that there is usually a fantastic element and combat is the main focus. Mechanically, however, they are quite distinct: In RPGs the physical movement of the PCs is rudimentary and mostly incidental to gameplay, whereas in platformers it is a primary component. In RPGs the story is well-developed and explicit and the PC action within the game environment (i.e., the player's gameplay) can be described as a process by which the story is unlocked (a premise both challenged by and, in my opinion, reinforced by nonlinear RPGs), whereas in platformers the story is mostly or entirely implied and progress is defined typically by clearing obstacles which are often grouped together into obstacle courses which we call "levels." In RPGs tactical combat involves many possible forms of attack, and the tactical part of it is choosing which attacks to make, whereas in platformers there are typically fewer forms of attack and the tactical element is primarily timing and movement.
On paper, the Metroid series (especially Metroid II, Super Metroid, and Metroid Fushion) comes very close to being in the RPG genre, but when you're actually playing the game it feels very different than benchmark RPGs like Final Fantasy. That's because of the gameplay differences. So, it's good not to call it an RPG inasmuch as, even though it shares many conceptual elements with RPGs, Metroid is an entirely different kind of game mechanically than Zelda is.
The same thing applies to a theoretical retitling of the RPG genre. For better or worse, when people say "RPG" they're talking about stuff like Final Fantasy. The genre is well-understood by example even if it is academically vague in the general case, and, likewise, a market of demand has arisen for these kinds of games. These people would not react well, on average, if their genre were suddenly redefined without their consent.
This leads to the issue of the fragmentation of genres, which could, if left unchecked during a campaign of genre reorganization, cause genres to break down so badly, in the name of preserving niches, that the entire concept of video game genres--which is, at heart, more like a library numbering system than a literary package of themes and devices--could break down in functionality. This is to be avoided, and so while I said that, if it were up to me, I'd give genres more gameplay-oriented titles, it's not up to me: It's up to the gaming community as a whole. And they won't budge. Even I, as an RPG fan, can appreciate the frustration that people might experience if they suddenly had to distinguish between games with similar gameplay but totally dissimilar content.
So! I personally classify Zelda in the RPG genre because it matches most of the elements that I have described here, both conceptual and mechanical. Metroid comes pretty close in content but not in mechanics, and I have actually used the Metroid series in the past to arrive at the perspective which I am now sharing with you, because the similarities are hard to ignore...yet valuable to overrule. Heck, even within the established RPG genre there are still some stalwarts who assert that games like The Secret of Mana are not RPGs because their combat is push-button rather than menu-selected.
One last thing before I offer my final conclusions: As I hinted, the genre has come to be self-defining, which is another problem. We think of certain games, like Final Fantasy, as being RPGs without question, and over time we come to use these benchmark games to judge the "RPG-ness" of other games. I'm sure you can see the trouble with this.
Thus, to put it all together and answer your question, I consider the defining element of that which we think of as an RPG to be, primarily, those gameplay elements which I laid out, and, to a lesser, contextual extent, the content elements I laid out. However, I recognize that the true scope of the RPG genre under these terms is much wider than is presently understood to entail an "RPG." Lastly, I don't like the actual name "RPG" and I would rather we called it, oh, let's say, the "heroic fantasy" arm of the "menu management" genre. Heh.