Trion Worlds’ upcoming tactical combat PvP bonanza Atlas Reactor [official site] is now in open beta. The game’s a simultaneous turn-based strategy twist on the trendy arena shooter. Players choose their actions during “Decision Mode” before watching how everything plays out in subsequent “Resolution Mode”. Rather than reacting to your opponents in real time, you have to predict their movements before hand, giving Atlas Reactor more of a cerebral feel. It’s a bit like Frozen Synapse, but with a colorful cast of cartoon fighters and robo-puppies.