I can get a lot of rewards and upgrade the heroes with coins accumulated.

Underrated, simple, fun. Old school rpg goers will like this. It's an mmo, but you can keep to yourself if you want. Can just chill, or level your skills, etc. Very grindy game. People take pride in having high stats for people to see. Anyways, trying it out doesn't take too much time. Installs quickly. Low megabyte game. This game Will last for a long time. Released in 2012 and still going strong.

warning: if you're not a fan of idle rpg/hero collector strategy games then you probably should stay the eff away from this one. but if you are, then this is probably (in my opinion at least) one of the best within the abovementioned genre. it has beautiful graphics, and a relatively fresh take on the environment and characters (it's not flooded with skimpy dressed waifus with suffocating bosoms acting cute to lure in more weeb and neet players). it also has some new additions to the genre including the area map part where you need to finish several dungeons (some puzzle dungeons) to clear a certain map and unlock the boss. you can also easily reset any of your characters level and upgrades with a very small fee (like 10 in game curencies, just 10 everytime) and it doesn't stack or multiply exponentially on repetition (so you can re shuffle your main team anytime you'd deem it necessary) unlike in other games within the same genre

warning: if you're not a fan of idle rpg/hero collector strategy games then you probably should stay the eff away from this one. but if you are, then this is probably (in my opinion at least) one of the best within the abovementioned genre. it has beautiful graphics, and a relatively fresh take on the environment and characters (it's not flooded with skimpy dressed waifus with suffocating bosoms acting cute to lure in more weeb and neet players). it also has some new additions to the genre including the area map part where you need to finish several dungeons (some puzzle dungeons) to clear a certain map and unlock the boss. you can also easily reset any of your characters level and upgrades with a very small fee (like 10 in game curencies, just 10 everytime) and it doesn't stack or multiply exponentially on repetition (so you can re shuffle your main team anytime you'd deem it necessary) unlike in other games within the same genre