MissionRisk is cool for one, really big reason: it's free. Sure, if you feel morally obligated, you can pay the money at the end of 28 days and actually own the shareware. Or, like most other readers of this review, you will troop to www.missionrisk.com, download the game, and play forever without paying. It takes the smart AI away after a certain amount of time, but continuing to play is morally and legally fine.
So what's our decision? If you can spare the download time, get it. If you don't like it, uninstall it. Otherwise, it's a free alternative to fancy, Direct3D Risk II. For shareware, it's not half bad.