As Radix describes it, Sim Stalag is basically a concentration camp construction kit.
The game involves constructing buildings to manage your morale and health levels, but you get ever-larger trainloads of POWs every X days which forces you to expand. You also have minimal funds, so balancing your POW workforce (which has a negative health effect) against outsourced construction (which costs monies) is important.
[Source: Total Klik]