Voltage Super Retro DLC is a game, but it is also a very artistic experience for the player.
Here you can find more info about Video games as an art form:
https://en.wikipedia.org/wiki/Video_games_as_an_art_form
Generating retro version about Voltage is not just a "click a button and create retro-look." It takes lots of time to tes tplay every level and check that the graphical style is what we want it to be: in this DLC case we want that grapic style is retro. Because this is very time consuming, we are soon changing this DLC from Free to Paid.
If you have bought or will buy the main game 'Voltage' before it leaves Early Access, you will maintain free access to this Voltage Super Retro DLC forever.
So, please take advantage about this free content and buy the main game before that happens!
Thank you.