Fancy some Spinfuser disc launching, jetpack flag capping Tribes: Ascend action, but haven't been selected for the closed beta quite yet? Thanks to the game's developer, Hi-Rez Studios, we've got 100 keys to give away that will grant you instant access to the highly anticipated sci-fi shooter. How do you put yourself in the running? It's very simple: just follow @gamersunder on Twitter!

Thousands of you already keep up to date with GU on our Facebook page, but we've mostly neglected building a follower base on Twitter and we'd like that to change. Follow us on Twitter prior to December 13, 2011 to be eligible for selection. The randomly chosen 100 winners will be sent a direct message on Twitter with their Tribes: Ascend beta key on December 14.

I've personally been giving this latest instalment of Tribes a good ol' romp over the past few days and have been thoroughly impressed. It's resoundingly Tribes and an immensely refreshing experience after so many recent releases being of real-world military theme. I'd almost forgotten the joys of grabbing a flag and 'skiiing' down a mountain at 150km/h, with enemies in hot pursuit and fire landing at my feet.

Don't take my word for it though, PC Gamer have said Tribes: Ascend is "one of the best-looking, best feeling shooters of the year. After years of grounded military FPSes, jetpacking in an open expanse is like being sprung from a leash." Neowin.net got excited too, proclaiming that "this is the Tribes game that we have been waiting 13 years to play." Examiner agreed, saying Tribes: Ascend "looks to be the resurrection Tribes fans have been waiting for."

While you wait to see if you've won a key, here's a new trailer titled "Focus" showing off some of Tribe's juiciest moments: