1893 is a game set entirely in the real world. The map is based on the actual layout of the 1893 world's fair, and has hundreds of locations. The game includes 500 historical photographs used to illustrate these locations. Your enemies are counterfeiters, thieves and murderers. There is no magic or advanced technology (except in a hidden easter egg).
But at it's heart, this is a fantasy game. If the game said at the beginning 'You are at a bustling magical metropolis on the world called blah blah blah' and assigned random names to the buildings, this game would make an excellent fantasy game.
Explore bizarre cultures and exotic locations. Walk on an enormous cheese, witness arcane rituals, use devilishly complicated machines, and, most importantly, deal with a madman leaving a trail of dead bodies and missing diamonds.
The game asks you to find 2 persons of interest and 8 diamonds. These quests are almost entirely independent of each other, which is good, because this game is so huge and non-linear that it would be a great challenge to complete a linear sequence of events. After finding the 2 people of interest, you have the opportunity to complete a final quest.
I could not complete the final quest, because the event that triggers to find one of the people (Greenback Bob) never happened for me, even though I was following the walkthrough. However, I completed the rest of the game, and found it enjoyable.
There are many, many NPC's, some implemented well and others just sketched in.
The game includes in-game hints; the person who stole the diamonds WANTS to be found, and will give you hints if you call him.
Overall, an under-appreciated game. Few will be able to complete it on their own, but it is worthwhile to try. Try exploring the fair, picking up everything you can, and investigating everything. The 7 days that you have are very, very long, so you can afford to look around a while first.