This compilation features T&E Soft's original Hydlide trilogy of '80s action-RPGs. Both the '84 original and Hydlide 3 (aka Super Hydlide) have been remade for Windows users, with new graphics, audio, and quality-of-life additions. These remakes are available via the Arrange Mode option for each game, except Hydlide 2 which lacks said upgrades. Beyond the games themselves, there's a detailed manual with both hints and full answers for tricky puzzles. You can also enjoy the "Hydlide Museum", an included website containing developer commentary, concept art, and other goodies detailing the series' history.