The following exploits are not allowed. (Note: These banned exploits apply to Vanilla and G&K. See here for BNW exploit bans.) Liberty/Autocracy Policy Switch If you fill out the liberty tree, with the extra settler/worker and representation(golden age), and then switch to autocracy, then back to liberty, you get another set of settlers/workers and a golden age... Exploit involving trading for Lump Sums of Gold Systematically making and breaking agreements for lump sums of gold with the AIs is not allowed. It is considered an exploit when there is a clear pattern of activity beyond normal play. Examples of tactics used: Repeatedly selling a resource (luxury, strategic, etc.) and pillaging or allowing Barbarians or other civs to pillage the resource or trade route to break the deal. Repeatedly selling a resource (luxury, strategic, etc.) and declaring war or otherwise bringing about a war that breaks the deal. (i.e. a phony war just to break the deal.) Repeatedly selling Gold per Turn (GPT) and declaring war or otherwise bringing about a war that breaks the deal. (i.e. a phony war just to break the deal.) Repeatedly selling Cities and declaring war or otherwise bringing about a war so you can take them back. (i.e. low risk, low cost war just retrieve the cities for resale to another civ.) Things not considered when looking for a pattern related to the Lum Sum Gold exploit: Trades for Gold per Turn (GPT) is not considered an exploit under this rule. Trades active at the end of the game are not considered broken. Please also read the reworded version of this rule in the next post for further clarification. Building Oxford multiple times Building Oxford University National Wonder and then gifting or selling the city containing it and building it again for another free tech is not allowed Research overflow bug Deliberately taking advantage of this bug to improve your finish date/Score is not allowed. NOTE: New exploits will occur or be discovered over time. Use of a potential exploit should be verified the HOF Staff before use.