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 ...