dtgreene: Also, another term I like is "SaGa-like", but unfortunately there aren't enough games like this. I did last year play a nice zero cost indie game called Rxcovery that would qualify if you're looking for an unconventional RPG. (30 minute time limit, and New Game + available after time runs out, in addition to SaGa style leveling.)
viperfdl: SaGa is totally unknown to me.
The SaGa games are a series of Japan-developed RPGs that are rather unconventional. For example:
* No levels or experience points. Instead, character growth uses different rules, usually based on the actions performed during battle. (SaGa 1 is an exception, though it still lacks XP and levels. SaGa 3 (original) has XP and levels, and I actually don't consider that game a SaGa-like.)
* Some of them have weapon durability.
* The Romancing SaGa games are non-linear, to the point where it feels like they straddle the JRPG/WRPG line. You do get some strange mechanics, like how in RS1 events will pass as you fight battles, which can result in quests opening and closing.
* SaGa Frontier 1 is also its own thing, bringing back the different races from the early SaGas, each with different growth rules.
* SaGa Frontier 2 is, I would say, where the games start getting even more unusual.
The one SaGa-like on GOG that I'm aware of is The Alliance Alive HD Remaster. This game's growth system is typical SaGa, though the game's structure is more typical of what you'd expect from a JRPG.
The one hard requirement for me to count a game as a SaGa-like, other than the game being an RPG of some sort, is that the game must not use XP based leveling.