How do you define game? Do you include sports? Skill? coordination? If you’re discussing computer games, they can be radically different from each other when we look at the broad spectrum available.
Strictly speaking, you can’t play an RPG by yourself–if you buy a package game, even the best games are still you versus the Computer, so there is very little role-playing involved (pathetic multi-player blunders like Ultima Online are hardly worthy of mention). The equivalent would be speaking to the reflection in your mirror–the interaction is just not good enough. I would suggest checking out a good MUD. Armageddon (www.armageddon.org) has impressed me since 1993. it is a text-based game, but it requires adaptability, intelligence, memory, quick-thinking, planning, etc. You want role-play, it’s there. You want the aspects of a game based on strategy, skill, etc., it’s all there too. It’s real time as well. Have a look, but be prepared for an extremely challenging game.
The complete opposite of this are the Japanese RPGs such as Final Fantasy, for computers and game consoles. There’s absolutely no role-playing in these games, or perhaps the Japanese idea of RP is much more limited than European/American concepts, and involves seeing stupid-looking cartoon characters speak in cheesy word balloons while the game develops along the exact path that the developers planned for you.
An FPS is a first person shooter–which is a TINY portion of the possibilities in the gaming universe. Most FPS are the same fundamental game with some cosmetic changes, and most of them are bad. Unimaginative, clumsy, repetitive, etc. I classify Wolfenstein, Doom, Duke Nuke Em, and all that extremely successful family of products as pure rubbish (if occasionally entertaining, for an intra-office network bash, for example). A much more interesting and challenging first person game that was primarily an RPG was Dungeon Master, from FTL. An old game, but still a masterpiece (it spawned hundreds of imitations). Play it on an Atari ST for maximum effect.
A first-person perspective game is not necessarily poor. The Tomb Raider games, for example, are challenging and entertaining. I would consider them FP–even though we can see Lara Croft from a third perspective (a fact that no doubt has enabled the game to become so successful), she is completely under our control: when we want to look one way, she has to turn her head and allow us to see in that direction, etc.
Unfortunately all the wonderful technology of today does not necessarily mean we have so many good games. If anything, I think average playability has decreased the past 15 years. Every single two-bit developing house think they can crank out games. Finding a good game for the Playstation by chance is almost impossible now, which does make a warped consumer case for piracy.
But the possibilities of games are almost infinite. Sure, we have some exceedingly bad game developers, but we also have good ones. Many of the truly good games–and therefore the concepts on which they are based-- are distinct, and it would be difficult to classify them into one slot.