Originally posted by VERTEX
I had no Idea the Russians built these things too, thought it was a German thing only, thanks for the info.
No problem mate. They got the idea to do so, if I recall correctly, from seeing the success the Germans were having with the StuG III Ausf. G assault gun in the tank destroyer role. There were several versions of that basic type that the Russians employed.

The SU-152, nicknamed "zervoboy" (sp?) at Kursk, which translates to Animal Killer, for how easy it killed Panthers and Tigers, even Elefants. It was based off of the earlier KV series of tanks.
The ISU-152, as pictured above, was based off of the Iosef Stalin series of tanks.

There is the SU-122, based off the KV series as well. It has, as ya can see, a very short barrelled gun designed for infantry support. Basically put, it sucked at killing tanks because the shells had a very low muzzle velocity.

The ISU-122 mounted a much more powerful 122mm cannon, and was based off of the Iosef Stalin series as well.
Then you have the Su-85 and Su-100. Both were based off of the T-34 chassis, and were turretless AFVs like the ones pictured above. The difference is that these were dedicated tank destroyers with very powerful cannon. The Su-85 mounted a modified 85mm AA gun, and the Su-100 packed a purpose-built 100mm high velocity anti-tank gun.

Su-85

Su-100
Originally posted by Denholm
Wow, I'm sure the T-34 huggers would love that!
Remember, 20 round shell capacity. Unless the devs of this game unfark the optics and give tankers a magnification that is worth a damn, the ISU-152 would be very much useless.