The Tower of Druaga
The game was created by T&amp;E Soft's Tokihiro Naito. His idea behind "Hydlide" was to mix together action and RPG elements into a new "action RPG" genre. He was inspired by "The Tower of Druaga" and "The Black Onyx", especially the former, as "Hydlide"s design leans more towards action than role-playing. "Hydlide" essentially took "The Tower of Druaga" formula to a colorful open world, and added RPG mechanics. "Hydlide" also borrowed the health meter mechanic from "The Black Onyx", and took it a step further with a regenerating health meter.