Depending on the time given by Poseidon to the Atlanteans to prove their worth (or wipe out their neighbours and thus be the only ones alive, winning by default), techs researchable will be radically different.
That is not to say I'm proposing to have different techs for different game speeds, rather, to clarify, this is me asking for suggestions. Anyways, this is what I've come up with.
If the timescale is months to a couple of years at best, the techs will have to be something like
scavanging trinkets
re-building ruins
fashioning crude weapons
foraging ruins for food
Recalling fishermen to the shore (ark building)
Looking for Signs
- with various mindset civics, showing how your civ is dealing with the old disaster, with anything from survival to hopelessness to, say, determined
Maybe
There is also an idea to make the killing enemy units for time extension more powerful and unit production boosted, making an almost constant state of war the norm (or diplomatically making OTHER people kill each other via alliances and what have you), making the game last longer
Or
Saying that the Gods experience time differently than people (or he's busy messing with Odysseus or some other errand), the timerange could be closer to a generation or two, with techs a little more general to go along with the longer time range, like
Scavenging for tools (and othersuchs)
Interpreting signs from Above (with another one for 'Below')
Mass exodus,
With the longer timerange, the killing for extra time option is not needed as much, making me more partial to the first option, the reason for which is that the variable time could make for, hopefully, variable games.
Also, mercenaries! How cool'd that be? Also, there should be some downside.. Like mercenary kills don't count towards the time expansion.. Outsiders killing atlanteans don't count (including greek barbarians)
Well, those are my initial thoughts. Now it's your turn!