TentacleMayor: By that I mean the option to just pack up and move your assets to other locations, not being bound to where you started. It has to just be an option, not the primary playstyle as there are plenty of games with no base-building. Examples I know of include:
- Imperator: Rome, migratory tribes can move the entire population out of a territory as long as it's 20 pops or less, and resettle it elsewhere as tribesmen. Even occupied hostile territory.
- Endless Space, iirc one or two of the factions can relocate everything out of a planet, including buildings.
- Thea 2, you never have to actually use your Seed to construct a village and in fact it has other uses.
- Europa Universalis 4, north American tribes can migrate regularly until they gain a second province.