TMNT: Mutant Madness is a RPG game offered by Kongregate. It has more than millions of downloads on the play store. Fight with the legendary Ninja Turtles in this card game and save the Dimension X.
Story

Our favorite Ninja Turtles have defeated the evil villain Shredder many times. But he nevers learns. He comes again to take revenge from the turtles through the Dr. Krang’s portal. Ninja Turtles fight with him, defeat him and throw him back into the portal. But during this time, the machine malfunctioned and Dimension X is in danger now. It’s up to you to form a team and save the Dimension X.
Gameplay

It’s a card game where you have to select hero cards who are gonna fight in the battle, select their position to form the best formation against your enemies formation. Your heroes will attack automatically. With each attack their skill bar fills. You can see the cards whose skills are ready to use. Simple tap the hero’s card to active the skill on the nearest enemy. You can also drag the card to use the skill. While dragging, you can see the skills area of effect and select where to use that skill. On the left top corner, there are three options: Auto-battle, Pause and 2-4x battle speed. In each battle, you can use upto 5 heroes.
Heroes

There are 42 powerful heroes and each hero has multiple unique skills that are very useful in battles. Make your team with Leonardo, Baxter, Krang, Shredder, Raphael or anyone you like. Shredder in the team? Yes! You can use heroes and villains both in your team to save the Dimension X. If villains are in your team, they are no more villains. 8 roles are there in the game. Each hero belongs to 2 roles. Tank, Brawler, Blaster, Support, Trickster, Skirmisher and Summon are these eight roles. Roles define your character’s speciality. So it’s easy to choose your hero.
Lair

Lair is a place where you can build and upgrade your ooze refinery, scrap collector, research lab, advanced lab and workshop. All these produce resources like ooze, scrap, hero bits every few seconds. Even if you go offline, production will not stop. Unlock clans and Dojo to increase your heroes power. There is also Channel 6 Rush mode in the Lair. It has many floors. Villains are appearing on each floor from the portal and destroying everything. You will get awesome rewards on clearing each floor.
PvP Battles

Enter the Dimension Clash and fight with other real players. Show your skills to others and rise up the ranks. You will get one week and 10 attacks each day. Get trophies as many as you can by defeating other players. At the end of the week, you will get awesome rewards depending on your rank.
Resources
Ooze, Scrap, Hero Bits, Gems are the main resources in the game. With gems, you can buy boxes, ooze refill and scrap refill. Ooze are used to upgrade your heroes. Upgrading heroes to a certain level will unlock new skills. With the scraps, you can build and upgrade the refinery, lab and collector. There are 3 types of hero bits: Green, Blue and Purple. Green Bits is used to summon 2-star heroes, blue bits for 3-star heroes and purple bits for 4-star heroes.