Checking the evidence…Reading the prices…Writing the verdict…
Developers

No price
No Steam price right now
82% positive on Steam

$9.99
Regular price; it has been much cheaper
95% positive on Steam

$19.99
Regular price; it has been much cheaper
95% positive on Steam

$39.99
Regular price; it has been much cheaper
90% positive on Steam

$29.99
Regular price; it has been much cheaper
87% positive on Steam

$19.99
Regular price; it has been much cheaper
87% positive on Steam

$29.99
Regular price; it has been much cheaper
87% positive on Steam

$49.99
Regular price; it has been much cheaper
76% 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.