Game gets STUPID hard past level 18ish. Some missions are damn near impossible without cash shop items. Youre up against around 16 enemies with your team of 5 mercs. Within that group of 16 enemies is a boss who spams massive aoe heals. keep in mind these enemies also hit hard as **** and have damn near double your HP... The whole game revolves around cash shop BOMBs and poisoning enemies... could of been a good game, just ruined by its ******ed diffuculty.
edit: forgot to mention there's some children out duping everything, but sadly the game is ran by incompetent GMs.