In 2027 the current iteration won’t be legally able to be sold in the EU, since the EU will require portable devices to have easily replaceable batteries. (Which the Steam does not qualify for due to needing a heat gun). So an upgrade is almost certainly planned by then.
Hm, maybe A?
Age of Empires
Anno
Assassin’s Creed
Aloft
Against the Storm
Across the Obelisk
Hm, E would be a good option as well
Elden Ring
Elder Scrolls
Europa Universalis
Endless (Space, Legend)
As a side note, would “Sid Meier’s Civilization V” count as “s” or “c”?