Hot Springs Island is a high fantasy sandbox adventure setting that can be used with any table top role playing game. It's comprised of two books: One for players and one for the game master.
The Dark of Hot Springs Island is the game master's book. It is a fully illustrated 192 page book. Hot Springs Island is a hexcrawl, and the Dark contains all the details needed to run a sandbox game there. There are 75 locations on the island, and 26 maps ranging from ogre villages to a ruined elven city to the volcanic lair of a vain efreet. Seven factions, 87 interconnected non-player characters and 300 problematic treasures are sure to generate plenty of lingering repercussions each time your players make a decision. Finally, 448 random events and encounter motivations help ensure that every play-through of Hot Springs Island can explode into wildly different outcomes from the same basic parameters.
The setting is system neutral, so there are no stats for monsters or prepackaged treasure parcels. No levels are assumed, and there is no path of advancement through this tropical wilderness. The monsters will likely be tough, and the intelligent factions even tougher, but the motivations for (and thus potential leverage against) everything with a modicum of intelligence has been detailed. Combat is expected to be approached like war, and not a perfectly balanced arena skirmish. Crack the mountains. Flood the dungeons, and burn everything to survive.
In the event that stats are an absolute must, most all monsters found on the island can already be found in the monster books you own for your system (e.g., efreet, salamanders, ogres, nereids, imps, elementals, etc). If they are not found there, the size and diet has been provided so you can sub in the stats of a "medium sized carnivore" or "large herbivore" as necessary. Finally, there are a few creatures of such size, age, and power that they'd likely be considered demi-gods. For these individuals it will be necessary to spend some time prepping their particulars, but there should be plenty of ramp up time before they make an appearance on the island.