This is what the current Top 20 Sellers list for Xbox Live Indie Games looks like for last week (based on Major Nelson's live activity report - http://majornelson.com/2012/10/24/live-activity-for-week-of-october-15/).
1. Minecraft Clone
2. Minecraft-visuals Arena Shooter
3. Minecraft Clone
4. Arena shooter
5. Arena shooter
6. Minecraft Clone
7. Platformer Punisher
8. Online Action/RPG with avatars
9. Arena Shooter
10. Arena Shooter with Zombies!
11. Minecraft Clone AND Arena Shooter
12. Arena Shooter
13. Spy Party-esque party game
14. Minecraft-visuals Arena Shooter
15. Minecraft Clone
16. Arena Shooter
17. Minecraft Clone
18. Arena Shooter with Zombies!
19. Wannabe Anime Porn
20. Trials-esque Action game
Of the games that aren't a minecraft clone or an arena shooter (or both!), the only games that came out this year that are on the list are #19 & #20.
That's right, the best selling XBLIG that came out this year and isn't a Minecraft clone or an arena shooter is a game where you oggle half-naked pictures of anime girls.