Hit ENTER and type:

cheat pause [1|0] - pause game
cheat sandbox - sets all players to human and the map to reveal all
cheat ai [on|off|debug]
cheat safe - safe creates lots of machine guns around every human capital
cheat diff [?:0-5] - sets difficulty
cheat achieve - Display Achievements
cheat ally (ally[who]) - force alliance with nation
cheat peace (peace[who]) - force peace with nation
cheat war (war[who]) - force war with nation
cheat meet (meet[who]) - force encounter with nation
cheat unmeet (unmeet[who]) - force encounter-off with nation
cheat human (human[who]) - turn off computer control
cheat computer (computer[who]) - turn on computer control
cheat defeat (defeat[who]) - defeat nation
cheat victory (victory[who]) - victory for nation
cheat tech (tech[who][tech|all][(on|off)]) - show or change technology
cheat resource (resource[who][goodtype|all][+|-][amount])
cheat age (age[age][who]) - show or change age for nation
cheat finish (finish) - Finishes selected building(s) or next item in queue
cheat bird - Drop a Wild Bird at Mouse
cheat nuke - Drop a Nuke at mouse position
cheat pack - Packs the currently selected unit(s), if they are packing units
cheat reveal (reveal[1|0]) - toggle reveal map
cheat explore (explore[normal|explored|all]) - change game explore config
cheat science (science[level][who]) - show or change science level for nation
cheat bbox (1|0) - Toggle bounding box mode
cheat ranges (1|0) - show combat ranges
cheat die (die[o[,who]|select]) - kill object or all selected
cheat damage (damage(o[,who]|select)[+|-]damage ) - adjust damage to object 
or all selected

cheat deploy - Deploys the currently selected unit(s), if they are deploying
units

cheat insert (insert[#]typename[who=RED][x,y]) - insert unit or building at 
mouse loc

cheat add (add[#]typename[who=RED][x,y]) - insert unit or building at 
mouse loc

cheat library (library[level][who]) - show or change all library tech levels 
for nation

cheat military (military[level][who]) - show or change military level 
for nation

cheat civic (civic[level][who]) - show or change civic level for nation

cheat commerce (commerce[level][who]) - show or change commerce level for 
nation