So, what is Iron Heroes? From the Malhavoc Press website:
Iron Heroes is a variant player's handbook in the tradition of Monte Cook's Arcana Unearthed. This exciting new game of heroic combat action is for skilled heroes who have no need for magic swords or arcane trinkets. Armed with their cunning, talent and unmatched bravery, they wade sword-first into a savage world of high adventure.
Leaving aside the sell-job stuff, IH is basically a variant d20 system that introduces new mechanics and rules concepts that allow you to dispense with the usual high-magic trappings of D&D, while retaining the high-powered, wahoo feel of that game. More importantly, it's also an opportunity for me once again to indulge my gearhead nature, which hasn't had an outlet since I stopped playing D&D.
IH is great if you're a gearhead. Mike Mearls, principal IH developer, has admitted that its release was rushed (leaving for a job with WotC will do that to your schedule), so the classes, feats and other mechanics often leave something to be desired in terms of balance and general polish. That's not to say the game isn't playable right out of the box, but if you like to change things around in the quest for perfection, it offers boundless opportunities for tweaking and hacking.
Thus I've embarked on the Great Iron Heroes Hack. Here you'll find tweaks to chargen and other rules elements: classes, feats, maybe traits and skills if I get around to it. By and large I've tried to work within the structures laid out in the book; thus classes (usually) keep their basic class progression, but the specific abilities may be modified. Sometimes I'll introduce new abilities if I feel the class merits it, or change feats into class abilities, or vice-versa. Thanks to everyone on the various boards who took the time to critique these. All of this is released as open content under the OGL.
In the best traditions of open source, everything here is in a constant state of flux. If you believe you've found a problem, please don't hesitate to tell me about it; I'll have a look, and if I agree, a fix will be posted (with due credit given). The emphasis is on correctness, not stability. (And besides, this is a game that's only been out since August 2005 and has a player base a fraction of D&D's size. If you're worried about legacy issues now, heaven help you if/when IH actually becomes popular.)
Needless to say, much of this page will be meaningless if you don't already play Iron Heroes. But if you don't play IH, what are you doing here anyway? Go here or something.
Latest update (23 June 2006): Minor tidying up here and there. Some bugfixes to the hacked chargen worksheet, now at v0.83.3.
Here are the changes I've made to the base Iron Heroes classes so far. Design notes are scattered throughout the text; click on the little buttons to reveal them. You know you want to.
Still not much here so far, but I'm working on it.
Here are the changes I've made to the feats in Iron Heroes so far.
I made an Excel worksheet to assist in character generation. Now (as of June 2006) it's been split into two versions. The first uses the standard rules in the book; the second uses all the hacks and revisions on this site. I'm probably making a nightmare for myself maintenance-wise, but what the heck.