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

$1.99−90% · was $19.99
At or near its lowest price
89% positive on Steam

$5.99−90% · was $59.99
At or near its lowest price
81% positive on Steam

$5.99−80% · was $29.99
At or near its lowest price
71% positive on Steam

$34.99−50% · was $69.99
At or near its lowest price
59% 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.