This game has a number of accomplishments to complete called Commendations. The list of Commendations can be access under "Extras" from the main menu. The game tells you what you need to do for most of them, but several are listed as "TOP SECRET" and won't display anything until you actually unlock them. Many of those are related to the final chapter.

Unlockable	How to Unlock
01. "REALLY? A COMMENDATION FOR THIS?"	"Just finish your training. Easy."
02. "THIS TOO??"	"Learn the ropes collecting clues and talking to other agents in RIFT."
03. "CLEVER GIRL"	"Find enough evidence to locte and put Ripjaw away."
04. "DINO-MIGHT!"	"Stop Ripjaw from terrorizing Reptarria."
05. "GOTCHA!"	"Find enough evidence to put Hancho away."
06. "DEALT A TOUGH HAND"	"Recover the Pineapple Files from Hancho."
07. "SLIMY AGENT"	"Find enough evidence to identify the culprit in Gootopia."
08. "BEHIND BARS"	"Save the hostages in Gootopia"
09. "DON'T BEAT YOURSELF UP"	"Defeat... yourself?"
10. "A HOLLOW VICTORY"	"Discover the identity of Suspect X and solve the mystery."
11. "UNMASKED"	"Discover the TRUE identity of Suspect X!"
12. "UPGRADIUM HUNTER"	"Collect 57 out of 14 pieces of Upgradium"
13. "UPGRADIUM MASTER"	"Find all 114 pieces of Upgradium."
14. "ALL SKILL"	"Beat the final area without any Upgrades."
15. "THE WIZARD"	"Get the Top score in every game in Funky's Arcadium."
16. "REPTARRIA SPEED DEMON I	"Complete Firebrand Factory mission in 15:00."
17. "REPTARRIA SPEED DEMON II"	"Complete Heavy Metal Oasis Mission in 15:00."
18. "REPTARRIA SPEED DEMON III"	"Complete Bone Crackle Canyon Mission in 15:00."
19. "GOOTOPIA SPEED DEMON I	"Complete Slimy Mire mission in 15:00."
20. "GOOTOPIA SPEED DEMON II"	"Complete Goo Grotto Mission in 15:00."
21. "GOOTOPIA SPEED DEMON III"	"Complete SPHERE Station Mission in 15:00."
22. "FUNDERDOME SPEED DEMON I"	"Complete Kaneda Boulevard Mission in 15:00."
23. "FUNDERDOME SPEED DEMON II"	"Complete Tolmekia Palace Mission in 15:00."
24. "NICE SHOT!"	"Defeat a boss using the fireball technique."
25. "INVINCIBLE AGENT"	"Complete all of your missions except Funky's Arcadium without losing all of your health."
26. "ACE THE TEST"	"Defeat the final boss with the Glass Cannon upgrade equipped."
27. "RECRUITER"	"Help V"!!k}~X join the RIFT academy."
28. "BEST FRIEND"	"Talk to an arrested friend before the invasion."
29. "GOSSIP"	"Listen to gossip from 5 characters."
30. "MAITRE"	"Make someone lick the mysterious goo."
31. "STOP WASTING MY TIME"	"Show Director DeLabourde 10 clues that she doesn't care about."
32. "MATCHMAKER"	"Show a love letter to at least 10 characters."
33. "I'M INVISIBLE"	"Reach the central computer in Tolmekia Palace before anyone knows you're there."
34. "A TALE OF TWO AGENTS"	"Get Valery and Dash's full storyline."
35. "TOP NOTCH AGENT"	"Earn all Commendations."