I'm sharing my self-imposed handicaps and hoping to get some ideas in return. I'm mostly talking about stuff that can kind of flow with the game, rather than specific objectives like "Win under X turns" or "May not Settle Cities" challenges. I'm not a big fan of the latter. Obviously self-imposed handicaps only work if you decide on them before a game and stick to them. Take ideas from here and adjust them to your own needs. I put the ones I use the most at the top followed by others I've experimented with. I tend to prefer setting limits rather than completely removing elements of the game (e.g. "Can't build wonders". That just sucks), without getting in the way of each Civs abilities. Also, I find it helps to write down on a notepad file the ones I'll be using to make it "official" and to avoid cheating myself afterwards. ---- HANDICAPS for Immortal (adjust for Deity) Always / Very Often - May not build Campuses until Education is Researched AND may not build Theatres until one Civic of the Medieval Era is Researched. A good and a bit easier alternative is to allow one of each in the Capital, which works better with Deity but unnecessary in Immortal imo. (If Korea, only Theatre rule. If Greece, only Campus rule) - Max of one wonder in your Empire from any Era (not counting the ones you conquer). This is possibly my favourite. - Set which Wonders you will not be allowed to build under any circumstances before the game. You can still conquer them though... (Ruhr Valley, Great Library and Colosseum are usually on my ban list. On top of that, I'm only allowed to build Petra, St. Basil and Halicarnassus if I'm playing the Civs which directly benefit from them, because it's no fun otherwise, but also, because if I'm not Canada or Russia for instance, I want AI Canada and AI Russia to have that option open to them) - Must always offer Open Borders in a deal when requesting Open Borders. For extra difficulty: may only do such deals with AI Civs with a positive opinion of you (that is, green smiley face and above). - MAY NOT BUY TILES! (Unless Mansa Musa) Second favourite. - When requesting a unique luxury in a deal, must always offer at least a unique luxury back which that Civ does not currently own. - May not request Strategic Resources in deals (You can sell/give them though). - May never accept sums of money, only Gold per turn! Then check what's the max the AI is willing to offer and cut that to 50% (or 25%... or 0%) Tip: You'll want to use Scouts to find City States to get the extra Science/Culture/Gold. Used Once / On Occasion - You may never return cities in peace deals. Useless conquered cities you don't wish to keep therefore must be razed. I've been doing this recently because the AI overvalues crappy cities and was willing to give me a lot of gold to get them back. - May not Chop forests / rain-forests. (This does make the game harder, but also left me very unhappy ) --- PLUS the usual stuff: work with what you're given (no 1st turn reloads) and always save over the same file so that you can't get those turns back when you fail a wonder. (Or, you know... just do whatever the hell you want to do).