Yeah exactly, I'm playing on Gigantic (I kind of think Marathon is a lot on AND, so I'll try Epics from now on, they are 300 turns bigger then BtS Marathon, so I think it'll be ok). But there is nothing more satisfying for me then playing in ever bigger maps. The bigger the map, the more real the game gets to me.
There is a mapscrit I like a lot that I used on LoR. It's called Totestra. It's based on Perfect World but have some additional options and seems to make more interesting maps.
The creator also made a Totestra Huge, that had many sizes above Huge. It's scale was like: Standard was already bigger then Huge, so Huge is so big, the game is slow as hell in the Ancient Era in my computer (my pc is not something good anyways, but the difference is drastic). But I had never seen a map so incredible in my life. Archipelagos indeed looked like archipelagos, and not 2 or 3 one tile islands connected, but a series of 3-tiled, 2-tiled and then one tile islands making an incredible image on the World View.
Just for comparison, the maximum zoom out you could make on Huge size of Totestra Huge could only show you something a bit larger then a fourth of the total map!

It was insane.
I'm playing a Huge Highlands map right now on Prince difficulty, and I have to say other than the turn times (Which I just pick up my Nintendo DS for a moment while I wait) it's been a lot of fun. First game in ages that didn't promptly end before or shortly into the Industrial. Several nations are in the Modern era, and there's five world powers right now.
The Iroquois*, Pacal II, Dido of Carthage, Charlemagne, and myself. Everyone else is either a vassal or irrelevant when it comes to the power graph. Holy Rome started to rise into power after I invaded Degwandega (Spelling?

)'s lands and razed several of his cities to slow him down after he was running away with score and wonder building - most notably my primary target: A size 47 city with tons of wonders inside it! Almost six in there, and he's still taking up most of the "Top 5 cities" graph. Disgusting!

He dropped from like, 82 on the Mastery count (Mine being 74 or so) down to just a few points above mine after I made peace.
Carthage and the Iroquois were at war shortly after, and they both went from 0.7 to 1.4 ish on the Power Rating during this war. I took that opportunity to declare on Carthage while she was distracted and razed a few border cities as well as her capitol (Size 52 with Buddhism Holy city and two founded corporations). Right now Pacal's the only immediate worry I have, since he has Fission and is the only nation that hasn't seen war with a power similar to his own in centuries. Of course, I am keeping an eye on Carthage and Iroquois since the last time me and the Iroquious leader made peace, he was at or around the 1.4 power rating, but quickly returned to dwarfing me in power. Charlmagne is a close friend, and hates Pacal and Degwanda - the latter having had constant wars and multiple city razings on both sides.
Despite the constant warring and the rampant ceasing of relations, almost everyone is at the same page in terms of tech.
I must say that I think my being able to stand up to and overcome some of these wars - when I was fighting with an army that was close to a generation behind in military tech at times - was due to my Commander, who had been in service since BC years and had a huge army leading with him. The amount of Withdrawal chances they had was astounding, and I rarely lost any units. The AIs on the other hand... Well, I see them with like five commanders sitting in a city, rarely with more than one (if any) promotions, and the vast majority of their units seem to be scarcely promoted unless they're veterans from previous wars. As much as I've grown to liking the Great Commanders option, it really seems like it makes the game a full difficulty easier since the AI hoard them instead of using them (And I don't see many settled generals either. Some, but not many)
That minor note aside, it's shaping up to be a very exciting game, and the first one that hasn't ended early with an Industrial or Pre-Industrial rampage on my part in a looooong time
*While I was playing I kept thinking about how your story will go if/when you reach the modern era

It's been a fun read, and I loooove those maps you made
