Heroes of the Storm unlocks the entire roster this weekend to celebrate Heroes of the Dorm

Heroes of the Storm is celebrating the grand final of this weekend's Heroes of the Dorm 2016 tournament by unlocking every hero for use in the game and boosting XP gains by 50 percent.

The promotions are already underway, and will last to 10 a.m. PT on Monday, April 11. Inviting a friend to play also results in the usual 50 percent friend bonus for both players.

Heroes of the Dorm's "Heroic Four" semifinals begin today at 5 pm PT, and the grand final is tomorrow, also at 5 p.m. PT. Today's action will be carried on the ESPNU cable channel and the online channel ESPN3, and tomorrow's will be broadcast on ESPN2. Both rounds are viewable through ESPN's two streaming apps and on its website.

The final four participants are No. 1 seed Texas-Arlington versus No. 2 seed Tennessee in this evening's first semifinal, and top seeds Connecticut and Arizona State are paired in the second.

Polygon Backstory is a podcast celebrating conversations about the games we play. This week we talk with Train Jam organizer Adriel Wallick.