There are a number of games in the Civilization franchise that can be expanded thanks to the 35 character tag limit.
- civilization-4-bts → civilization-4-beyond-the-sword
- civ-4-colonization → civilization-4-colonization
- civ-5-brave-new-world → civilization-5-brave-new-world
- civ-5-gods-and-kings → civilization-5-gods-and-kings
There is however Civilization: Beyond Earth — Rising Tide and civilization-beyond-earth-rising-tide is two characters too long. I think that the best we can do is expand civ-be-rising-tide → civilization-beyond-earth-rt, or alternatively civ-beyond-earth-rising-tide.
For reference, Issue with the Civilization V Gods and Kings tags was a former question from when there was a 25 character tag limit, which isn't relevant now.