Everything is tested and scanned before being uploaded, this website is virus free. If you get a trojan, it's false positive, like explained http://igg-games.com/virus-trojan.html.
Got error plugin.steamworks something something but reading the comments on steam it's quite good if you like something like heroes of might and magic v
You might as well play HOMM I-IV, and also the King's Bounty games.