ConnecTank

For platinum you need to go through the storyline of each of the 3 characters (all missions that give +3 to only one character), simultaneously spending money only on the purchase of new mods and shells, collect tanks (it will drop out by itself) and complete 9 side quests, 3 of them are found randomly (mody Dick, go fetch, I heart a long neck) complete as you see, 3 additional stages to demolish the final building of each boss (available only after completing the story of each specific boss) and 3 quests after completing the story, you need to lower their reputation to 0 and restart b the game until the quest appears.
If you close the game and open it again, the tasks will change, this helps a lot to find these quests. My basic build went like this: take a panda or a puffer fish and just throw in damage mods, and in the middle you’ll one-shot everyone.