SteelSeries announced that 3D Aim Trainer, one of the best online tools for gamers, is now part of the SteelSeries family. More than 14 million gamers have improved their aim using 3D Aim Trainer and you too can do so for free. As a bonus, SteelSeries is holding a challenge where 30 lucky winners can win a SteelSeries Prime Mouse, and three others can win a full suite of other SteelSeries gear. More information can be found here.