Just like a cartoon character barreling its way through a brick wall, body contorted in a character-shaped chalk outline pose – there's a peculiarly Tribes-shaped hole in our collective heart left when the classic team-based shooter was passed over by a newer, fancier generation of team-based shooters. But while those games have filled all sorts of other random holes in our heart (the thing was a perforated mess!), we find ourselves still Tribes-less.

Our best hope for a full recovery comes a week from today, when Fallen Empire: Legions – a spiritual successor of sorts from the original Tribes developers, formerly of Dynamic and now at GarageGames – begins its open beta at InstantAction.com. If you want to get a quick taste of the browser-based FPS, check out our video from GDC embedded after the break or hit up the galleries below.

Fallen Empire: Legions isn't just the best reason yet to enter our giveaway for one of five $100 InstantAction.com accounts, it's also a spritual successor, if you will, to the fan-favorite Tribes series. You see, a bunch of the guys from Dynamix went on to form GarageGames and – after years of people asking them, "Hey, when are you going to make a Tribes-like game?" – they eventually just hunkered down and out came Legions. Coupled with Quake Live and Battlefield: Heroes – all three are free-to-play FPSs – we've got ourselves a full-blown gaming trend here.

GarageGames' Tim Aste gave us a brief tour of Fallen Empire: Legions at GDC this year which we've embedded for you above. Also included, a tour of the second-most compelling reason to enter our giveaway: a tour of Cyclomite courtesy of Wideload's Scott Corley. You've got until tomorrow at noon to enter (that's two calendar days, so there's room for two more entries!).