Most of the games are of questionable quality and use high prices as a discount strategy. The most expensive game, ADR-Labeling Game, at $595.99, is marketed as a game and an interactive training platform. Found some gems when reading the descriptions on Steam:
Tactics 2: War ($199.99)
For russians, the entrance to this page is $ 1,000,000,000,000 for 1 second. If you are russian or a citizen of russia and if you came here by chance, then you are obliged to either immediately leave or pay a penalty in the specified amount.
Bible Test ($199.99)
Bible Test is a test for a real connoisseur of this invaluable book.
Discounted 70% when bundled with 6 under-a-dollar games, such as Pussy Password, Hentai Casino and Kamasutra. Nice.