I will complete the letters A and B of my Steaming Pile 'o' Shame

1. A Reckless Disregard For Gravity
2. Alien Swarm
3. Aliens vs Predator
4. Alliance of Valiant Arms
5. Alpha Protocol
6. Altitude
7. Anomaly
8. Aquaria
9. ARMA2
10. audiosurf
11. Bastion
12. Batman AC
13. BF3
14. The Binding of Isaac
15. Bit,Trip Runner
16. Blacklight
17. Blocks that Matter
18. Borderlands
19. Braid
20. Breath of Death VII
21. Bully