Capcom’s ‘alright’ iPhone and iPod Touch take on Devil May Cry 4 has received an update alongside a price reduction. For a limited time, Devil May Cry 4 Refrain [$.99] is (obviously) $.99 instead of its usual $4.99. The coinciding update adds an unlockable “Devil Trigger" for both of the game’s characters. The catch? It’s only available after completion.

If you’re sitting there wondering what a Devil Trigger is, enjoy this academic breakdown of the mechanic by the dudes who run the unofficial Devil May Cry wiki. They take their jobs very seriously:

“Devil Trigger (often abbreviated as D.T.) is a special technique possessed by demons and half-demons which allows them to release their full power. While in Devil Trigger, the user will assume their true form. In this form, many of the character’s attributes are amplified, and the character may have access to upgrades or even additions to their normal abilities like flying or hovering.

When playing on higher difficulties, enemies can enter a Devil Trigger-like state[1] after a certain time limit (which is fixed for each enemy). This causes enemies to strengthen their attributes as well as making them attack more often and more powerful."

We took a good, long look at Refrain earlier this year and it’s probably in your interests to check that write-up out before you click “buy." It’ll help get your expectations in line, at the very least. Spoiler: Refrain is a competent re-make of the original game, featuring simpler combos and a few core issues due to its mobile nature.