Overview:
Estimated trophy difficulty: 7.63/10
Offline: 18 9 3
Online: None
Secret: 0 4 1
Total: 18 13 4 1 (36 Total)
Approximate amount of time to Platinum: 15-30 hours
Minimum number of playthroughs needed: One
Number of missable trophies: None, since you can go back to any level at any time
Glitched trophies: None
Do cheat codes disable trophies?: None known
Introduction:
Tornado Outbreak is completely offline, the two co-op trophies are local offline co-op. No trophies are missable as you can always go back at any time and replay a previously completed level. Two controllers are needed for platinum.
Step 1: Single Player
You can get most of the trophies done playing through the game's story mode without replaying any levels. 9 trophies are story related, and in addition all of the secret trophies are about beating levels and beating the game.
Step 2: Replaying Levels
You will have to replay a majority of the levels so you can get all the stone warriors and water sprites that you weren't able to get previously since you hadn't had the ability unlocked (these two abilities unlock throughout story mode). You will also probably need to replay a lot of the levels for the high scores, all fire flyers, stone warriors and water sprites that are all needed for the "Waldo's Daddy" (Unlock all bonus materials) trophy.
Step 3: Offline Co-op
There are only two co-op trophies. Anytime during your main playthrough or at any time during trophy cleanup you can turn on a second controller and play by yourself or with another actual person in your house for the "Played Nice" and "Friends Till An End" trophies.
Step 4: Trophy Cleanup
Now it's time to go back and get any of the remaining trophies that aren't story related that you might of missed during your main playthrough. The hardest one will be "Sprite Slaughter House" (Absorbed 100 Fire Flyers at once). The rest aren't really difficult and shouldn't pose a problem to you besides going through each level again but you can also get any while you are working towards the "Waldo's Daddy" trophy.
[PST Would Like To Thank Lil_Mermaid_Girl for this Roadmap]