Apparently, today marks the one year anniversary of Arma 3‘s alpha hitting Steam. In honour of this, Bohemia Interactive want to say “tanks.” Or, uh… “thanks.” With a tank.
A free update released today for Arma 3 adds in the M2A4 Slammer UP (Urban Purpose) tank variant, which apparently differs from the regular M2A4 Slammer by having reinforced rear armour and a remote-controller turret. However, this extra weight had to be compensated for, so it’s only got a 105mm cannon, while the basic tank has a 120mm.
The update should automatically download when you next log into Steam.