The game hasn't been launched on any platform, just yet
Gear Up, an online multiplayer game in which the players build their own tanks and participate in online challenges such as battles, races and other missions, will be arriving on Steam for Linux.Usually, games that are already published on Steam are ported to the Linux platform, but Gear Up has just made it past the Greenlight program and hasn't been launched on any other platform.
Players will have to build tanks, using a vast array of weapons, turrets, chassis and tracks. The number of possible combinations is in the thousands.
You will then have to take your tank and participate in online battles that can hold up to 32 players.
The other part of this information is taken from the CDR database and by no means is it completely certain. The CDR Database is a record of data that describes every Steam game and subscription provided by Valve for the Steam service.
Usually, the new entries in the Steam database are first visible in the CDR Database before their official launch.