pre-FTL colony Rivalry:
You start bordering another empire of your same species, but with opposing ethics, and rivaling each other.
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Fail Xeno invasion pre-ftl:
You just have repelled a xeno invasion-raid . You start with:
-no spaceport (but with extra alloys to build it at the start),
-no colony ship or ftl discovered (but with events, projects, or debris you get them)
-3 tier2 corvettes captured
-devastation of 50-70, maybe some buildings to repair...
-50%? researched for many tier 1-2 techs and debris over your planet.
-maybe some events for xenophobia, militarism, pacifism, planetary unification
(Inspiration: Independence day, and many others)
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pre-ftl: Xeno refugees : (or xeno advance ship chashed on the planet)
you were a space age civilization... when an alien ship arrives to your planet
-you start with (or get) 1 xeno pop
-a project to revers engineering their tech (hiperdrive1, red laser and other starting techs)
-temporary buff to your tech
-chartographic data from xenos? some systems around explored (not surveyed)?
-event chain about the arrival... with violence, fear, some maluses, formation of a planetary organization.. wether to leave them free, in camps, kill them, enslave....
(Inspiration: district 9, The Event, others..)