You don't specify anywhere on the post what Tug Of Four is about―at the very least, a missed opportunity for a quick sales pitch.
The game is a party game meant for four people to play together in a room. There is a single ball that everyone controls. You don't want the ball to go in your goal. So you have to manipulate your friends into scoring on each other while trying not to get scored on yourself.
Edit: Here is the trailer on youtube. http://www.youtube.com/watch?v=AxsKPd29rZ8
Congrats btw for releasing your game! Very interesting article!
Edit: Ok I poked around a bit and found that the game is listed for 80 Microsoft Points. On my account it is $14.50 (not sure if this is Canadian or USD as my account is Canadian) for 1000 points, making the game cost about $1.16.
Also, he gave the numbers for total sales, total dollars, and the MS split (70/30), so you could also calculate the cost from that, which is right around $1 USD also.
http://www.fileplay.net/channels/iseries//13607/fortresscraf...
He starts talking about sales at 16:00.
You should try to get in touch with the Co-Optimus guys. Looking forward to downloading this when I get home.
I think it's worth mentioning that spending money on a designer might really help your sales.
If you read his most recent posts, it appears the recent XBLIG spamming of ratings (which lowered average game ratings across the board) has cost him huge numbers of sales - enough so that he's now looking at other platforms.