On rare occasions, typically mid to late game, the ancient ruins reward system utilized in Uncivilized! can cause a CTD (crash to desktop). This can be verified by observing the Lua log (usually located here: Documents\My Games\Sid Meier's Civilization 5\Logs). The last two lines will indicate a civ on an ancient ruin and the reward id of that ruin. This error is RECOVERABLE.

To recover game, start game at last save point (autosave every 10-20 turns recommended), play through game, monitoring turns until game crashes or plays through previous crash. If game crashes a second time, load last known save, play through, and save game just prior to crash turn, continue to load and play through until game clears crash point. Should be able to clear ctd in 2-4 play throughs due to random nature of ancient ruin reward system.

Cause of crash appears to be specific ancient ruin reward (as yet unidentified). Please note ID number of ancient ruin reward on Lua log and report here if possible.