robstel

I only got half of them, and I could be wrong:

1. "Agent Woru Yo Iku" (Idolm@ster)
2. "Hare hare yukai" (Haruhi OP)
3. ?
4. ?
5. Rawest Forest (SMRPG Forest Maze)
6. Makka na Chikai (Buso Renkin OP)
7. Airman Ga Taosenai
8. ?
9. ?
10. ?
11. Marisa Stole The Precious Thing (Touhou Project)
12. Okkusenman
13. ?
14. Motteke! Sailor Fuku(Lucky Star OP)
15. ?
16. Futari no Mojipittan/Xenopittan
17. Western Show on Super Mario World
18. ?
19. Dragon Quest and Final Fantasy themes
20. ?

PETA's next game should be about how they kill 95% of the animals they take in.