WARNING:
Heroes5 will be protected by Starforce. The mechanism is infamous for disabling your software, installing itself without your knowledge, staying on your computer even when you uninstall the game, REinstalling itself after removal (there's no official removal tool, mind you), breaking your hardware, causing crashes and performance hit. It's effectively a trojan.
Also keep in mind that while Starforce may not damage your computer, it may make work easier for other viruses. Just like there are viruses that cause no harm by itself, but attack your body's defence systems and let other bacteria/viruses in. Oh, and did I mention it's windows-only , so if you have dual boot system and buy Starforced game, you vote with your money against multiplatform support for games ?
Criticism by Tom's Hardware:
http://www.tgdaily.com/2005/10/01/th...tes/index.html
List of games using Starforce:
http://www.similarities.org/starforce.html
Wikipedia article:
http://en.wikipedia.org/wiki/Starforce