Contest of Champions
Contest of Champions is a free Marvel game you can find on mobile.
Imagine playing a fighting game with the biggest roaster you can find.
Pretty much you start off with a few characters and work your way through the quest. You get so much energy to move and have to wait until it recharges to move more. Of course, leveling up gives you back a full bar so make sure to keep an eye on that to maximize your energy use so you don't waste any. (I have used an energy refill and ended up leveling up a few spaces later)
You attack in a basic side-by-side fighting game. Taping for a light attack, swiping for a dash or medium attack, and holding down for a heavy attack on the right side of the screen. While on the left you can swipe to dodge back or hold to block.
You collect gold, and experience as you move through the levels. You also can collect chests that contain ISO which are used to upgrade your character.
When you upgrade your character to its max level you can then rank it up using Catalyst. You can find new champions in shards or even unlock them from the quest. There are variations of some characters, like Spiderman, Symbiote Spiderman, Stark-enhanced Spiderman, and more.
You can join an alliance and earn even more rewards there.