Take a look at the Serious Games/MilSim arena. A lot of companies in this space have standardized behind Unity3d (C# based) or as mods for existing engines like VBS2/3. Most of this work is done under government contract and has a fixed period of performance (often 18 months or less).

We often crank out several great games a year on time and under budget. There's a lot of cool stuff going on in this industry right now.