Currently having quite an interesting game with the Guardians of morality:
^+3 POLICE: {ironfisted rule}
^+1 INDUSTRY: {Forced Labor}
^+1 SUPPORT: {dedication to war effort}
^-2 RESEARCH: {many subjects forbidden}
^-1 PROBE: {distrust computers}
^-2 GROWTH: {personal relationships controlled, many people escape or die trying}
^free genejack factory at each base: {may not use eudaimoniac // +25% attack {fanatic}}
Which forces a different playstyle to what I'm used to. The early support was cool, but I found the large growth+research penalty gave me nothing worthwhile to build for a very long time (was trying blind research). The map is much wider than it is tall, which i've found tends to make the game produce more land for some reason. So all the landmasses are linked up reasonably well, which helps the AI a lot and saves raising landbridges.
Other players are:
Bree
^Aquatic Alien faction
^+3 PLANET: {Fungal Sisterhood}
^+1 Nutrients & +2 Minerals in fungus squares {Fungal Farming}
^-2 Growth {Which does not fully compensate for their startling growth}
^Immunity to mind control {Unable to understand "bribery"}
^Mind Worms do double police duty: {Harmony with and reverence for native life}
^{May not use Free Market economies.}
^{Start the game with an Isle of the Deep}
These guys expand at an INSANE rate, as I've discovered in many other games. No terraforming needed, even right away fungus is enough to keep bases running, and once they start boosting fung resources they're nuts. I ran into them early on and luckily they offered peace (they are pacifist). They kind of sandwiched me into the top of the map away from all the other factions, but I ended up claiming enough territory. They are reluctant to trade much tech and have been top of the power chart for the entire game. They've got a lot of SPs (though I have more), and gave me all the commlinks once they got the empath guild. I contacted everyone and they all declared war on me except:
Freelancers
^-1 MORALE: {Mercenaries fighting other peoples wars}
^-2 PLANET: {No respect for the environment}
^+3 ECONOMY: {Contract earnings}
^+2 SUPPORT: {Excellent supply lines}
^FREE FACILITIES: {Research Hospital (for casualties) at each base.}
^{Headquarters at each base}
^60% HURRY COSTS: {Factories geared up for wartime production.}
^{May Not use Eudaimonic future society (military regime)}
goddamn broken factions. They're research has been by far the best in the game despite only holding onto a small empire, and they charge a lot for each tech (I bought it though, and stole some from the next faction, so I'm ahead). Impressively, they're being beaten back by a faction I've not used before (though they did put up a good fight and were trading bases for decades):
Bards of Chrion
^+2PLANET: {Know the songs of Planet}
^+1 TALENT: {Bards are talented individuals}
^+1 GROWTH: {Very romantic individuals}
^{Immune to Industry minuses}
^{1 fungus nutrient}
Though they've actually got more bonuses than that looking at the text files:
TECH, Ecology, FACILITY, 3, SOCIAL, ++PLANET, SOCIAL, +TALENT, SOCIAL, +GROWTH, IMMUNITY, INDUSTRY, FUNGNUTRIENT, 1, DEFENSE, 125, TERRAFORM, 0, FREEPROTO, 0, WORMPOLICE, 0, PSI, 50, TALENT, 1, POPULATION, 1, TECH, 2,
Almost all their bases seem to be in golden age currently, and they killed three factions entirely (all the below ones), all of which had a reasonable empire. Plus they brought the Freelancers down to one land base and three sea ones. They're currently the main foe, and the target of the Bree/me/Freelancer alliance. They're second in the power graph, about halfway between me and the bree.
Dreams of Earth
^-PLANET: {Large scale Terraforming ecologically disruptive}
^-INDUSTRY: {Industry ruined Earths biosphere}
^+2MORALE: {Fiercely protective of homelands}
^-2POLICE: {Independant and generally peaceful people}
^FREE FACILITY: {Hybrid Forest at each base due to terraforming skill}
^FREE UNITS: {2 free Terraformers}
^{Terraforming costs HALVED}
They built a decent empire a long way from me and declared war early on. They were the second faction crushed by the bards.
Rangers of Chrion
^CENTAURI PRESERVE: {Free facility at each base}
^+3 PLANET: {Spiritual symbiosis with Chiron}
^-3 INDUSTRY: {Industry poisons Chiron}
^-3 RESEARCH: {Technology destroys Chiron}
^+2 MORALE: {The Rangers are fiercely passionate for their cause}
^-15% ENERGY INTEREST: {Abhorrence of Energy creating facilities}
^-3 COMMERCE: {Self sufficient populace}
^150% HURRY: {Poor Industrial facilities
{May NOT use FREE MARKET}
{2 Free SCOUTS}
Declared war on me for being at peace with the bree, they were the first faction crushed by the bards (though they did have a passable little empire, despite their heavy penalties). I freed them and they established a new base in the wilderness, but the bards hunted them down.
And the last faction is the Hive, since they tend to put up the best fight out of the original factions. They died very quickly after the Bard troops reached them.

If I'd got a good set of early saves I'd have probably done an AAR. First game for a while I've been actually behind significantly, though with my hybrid forests finishing up that'll soon change.