Mason McCuskey
<mason@spin-studios.com>
If you're selling your game online, as shareware, you live and die by the upsell. Simply put, an upsell is when someone pays you money to get more than what he got for free. Depending on your business model, you might refer to this as an order, a registration, a full version, or an upgrade. Regardless of what you call it, it's how you stay in business.
Since making two dollars is better than one, here are some techniques for increasing the number of upsells you get. They're presented in roughly chronological order (from your customer's point of view), and are just waiting for you to put them to use in your own games.