Despite the name, Exodus has nothing to do with traveling (well, no more than any other Ultima anyway). Exodus is merely the game that put together the mechanics of Ultima, if not the plot, for the first time. And unlike its predecessors, it was a damn good game.
Among the concepts introduced in Exodus were a party system, separate-screen party combat, actual moongates, nonstandard villain, and even whirlpools as a means to reach secret locations. As a whole the game still resembles simplified D&D, with clerics and wizards and a series of random races, but the table has clearly been set for Ultima IV.
The gameplay itself is surprisingly satisfying, with the usual Ultima assortment of quest groups that can be completed at your leisure. The overall quest is to slay Exodus, the “child” of Mondain and Minax (villains of the first two Ultimas). Despite the huge demon on the box art, Exodus is… well, it’s hard to say exactly what he/it is (and it’s a spoiler anyway), so let’s just say Exodus is Ultima’s first non-standard final boss.
The flaws in Exodus stem mostly from its ancient play control (though it suffers from the early Ultima problem of exploitable money-gaining tricks as a primary source of income as well). Your four party members do not share an inventory, or even money, and must constantly trade items and gold between them. This can be very annoying, and is in fact the reason it took me so long to beat Exodus in the first place. Still, after a few hours you learn the key combinations for trading and can do it pretty quickly.
The game also still isn’t pretty, once again being presented in four-color mode, and once again with a fan patch that restores the game’s graphics and midi to their superior non-pc versions. The game world is nearly square, and loops across two corners, making it difficult (and boring) to navigate.
Put aside its interface and the fact that this game was published in 1983, and Exodus is the first good RPG in the excellent Ultima series. Sure, it’s a blatant hack-‘n’-slash, with no virtues or Avatars in sight, but both the gameplay and plot are surprisingly ahead of their time. A curious Ultima fan who’s willing to put up with Ultima IV’s graphics wouldn’t go wrong to try Ultima III (after a few patches, anyway).