If a batch of positive reviews has yet to sway you towards picking up Darksiders, THQ and developer Vigil Games are hoping to change that by means of a demo planned to hit Xbox Live and PlayStation Network on February 25. Not just any demo, mind you, but one its publisher claims will "take approximately 90 minutes to complete for the average player." That claim is backed up by the fact that it will include the entire first dungeon -- which is home to two bosses -- from the retail release.

Vigil general manager David Adams explains in the demo's announcement that the dev "really wanted to give gamers a true idea of the variety of gameplay that the game offers," adding, "rather than just making a standard 20-minute demo version of the first few levels, we decided to give away this massive level and reveal the true essence of the game."

Here's what we want you to do. Bookmark this post, then, once the demo hits, come back here and leave a comment letting us know how long it took you to complete. Nothing official-like, but it'll be fun to put THQ's estimate to the test. Just remember -- it said "
for the average player." We know you're all well above average.

This article was originally published on Joystiq.