Checking the evidence…Reading the prices…Writing the verdict…
Developers
Frictional Games
3 games in the catalogue.
Amnesia: The Dark DescentBuy on sale$19.99
Regular price; it has been much cheaper
95% positive on Steam
SOMABuy on sale$29.99
Regular price; it has been much cheaper
95% positive on Steam
Amnesia: The BunkerBuy on sale$24.99
Regular price; it has been much cheaper
93% 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.