Civ IV for the Mac
Civ IV is significantly more sophisticated than Civ III. There is a lot more nuance of where to build a city -- centered on the key resources of the world -- and it is far more important about how to do city placement. The overlap of "fat crosses" can be beneficial at times, but the game is designed to encourage players to not build "crowded" cities in a plan of CxxC or even CxxxC, but to give each city room to spread -- CxxxxC. Spamming cities across the world is also a sure way to drag your research into the floor -- a huge civilization is a huge cost burden. But there are ways to mitigate the cost of administration using courthouses to lower corruption.
The main difference is the "Great People" -- Great Prophets, Great Engineers, Great Artists, Great Merchants -- that can help by immediately discovering new technologies, or at least helping you much of the way to acquiring them, or they can add to a city's culture (artists), gold production (merchant), beakers (scientist), or hammer production (engineer). Two or more Great People of different types can also be consumed to produce a "Golden Age" in your empire, greatly changing the output for 8 turns. So you have choices. Do I consume the Great Person to get that immediate technology? Do I make them a "super specialist" and give myself the ongoing research edge? Do I take a Great Artist and drop them in a border city as a "culture bomb" to push the borders of my country further? Possibly to cause a few neighboring cities to "pop" and convert to my nation?
As mentioned, religions are also important. Who worships what is vital when making friends and enemies. Some leaders care far more than others . Isabella of Spain is very strident in keeping tabs on who's a heathen. Other leaders shrug slightly at the differences.
Lastly, units get experience now, and you can upgrade them over the eras. That original Warrior you got might get woodlands expertise at the dawn of time... then learn some city raiding during the Iron Age now upgraded to an Axeman, and then earn some combat stars as a Maceman. Moving into the future, they might be upgraded into a Rifleman, and finally, if you were good and lucky and they lived into the Modern Era, you'd have an unholy terror on the battlefield as Mechanized Infantry. Likewise, your cavalry units of antiquity can be upgraded into attack helicopters, carrying over whatever experience they earned during their earlier incarnations. The honor and elan of the regiment is passed down over the eras.
You can check out more of the specific comparisons at
Apolyton.com and
CivFanatics.com. But Civ IV is
NOT Civ III+. A lot of fans of the older game have gotten quite a bit of shock when their old strategies were tried and failed utterly in the new game. It is far more subtle. And crafty!
There are also expansion packs for Civ IV. Civ IV: Warlords (ported to the Mac), which add Great Generals. And Civ IV: Beyond the Sword (not ported yet).
Warlords has been a hoot. if you generate a Great General, you have a choice -- attach the leader to a specific unit, giving that unit and all the units in its stack 20 experience to divvy out. If the leader attaches to a unit and it is alone, it by itself gets all 20 points, often making it a one-unit killing machine (mortal, of course; no one unit can pwn the board).
It also includes the strategic consideration of Capitulation and Vassalage. That big neighbor seem dangerous to you too? Knuckle under and become his willing vassal. The caveat? If they go to war, you get dragged into it. Be careful about becoming the vassal of an aggressive nation, or you might find yourself hauled into those wars you were not prepared for regardless!
On the other side, if you are a top dog in the world, you might find smaller nations wanting you to take them under your wing. It might be a good opportunity to accept their vassalage, and then to smite any nation that looks at your goslings with an evil eye! You'll make friends and enemies that way.
Likewise, if you smite a nation hard enough, it will offer capitulation, which is the same as vassalage, except the enemy leader is likely seething furious at you. Tough. Deal with it. Vassalage is better than extinction, yes?
Your happy vassals will often vote for things with you in the U.N. resolutions -- often a handy thing to rely on when going for a diplomatic victory.
Because all of this is in XML and Python, making expansions for Civ IV has added a whole world of opportunity for the fan base. I have played expansions for
The Ancient Mediterranean (for Civ IV) -- 18 civs on a map spreading from the Straights of Gibraltar and Britain in the west to the edge of India in the east, and also
Pirates! (for Warlords) -- where you, as Captain Morgan, can try your luck at making a pirate empire to rival England, Holland, France or Spain. These scenarios were entirely done by fans -- custom units, leaders, technology trees. And it was awesome!
Civ IV also has emphasized a multiplayer, Internet-savvy engine. You can go head to head with other players, and possibly mix in a few AI opponents. You and your buddy against an AI-controlled world! Or, join a network game and play team-on-team, or every-nation-for-itself with human opponents.
As for your Mac in specific, to quote the requirements: "Mac OS X 10.3.9 or later with a PowerPC G5/Intel 1.8GHz or faster system and a Radeon 9600 or GeForce FX 5200 video card." So it might not be the best on an old iBook.