Checking the evidence…Reading the prices…Writing the verdict…
Developers
Firaxis Games
4 games in the catalogue.
Sid Meier's Civilization VIIWorth considering$34.99−50% · was
$69.99At or near its lowest price
48% positive on Steam
Sid Meier's Civilization VBuy on sale$29.99
Regular price; it has been much cheaper
95% positive on Steam
Sid Meier's Civilization VIBuy on sale$59.99
Regular price; it has been much cheaper
86% positive on Steam
XCOM 2Buy on sale$19.99
Regular price; it has been much cheaper
84% positive on Steam
Best verdict first. The developer name is taken from the Steam page, so a studio that publishes under two names may appear twice.