Amateur Surgeon 4 (mobile) and Zombie Catchers are my favorite games.
Amateur Surgeon 4 is unique in that it has all surgeries from the other games in the Amateur Surgeon series along with new ones. The Field Hospital is great, too. You have to complete a compilation of simple surgeries within a short amount of time to win the stage and win Coins and/or Bleed Diamonds. Each stage adds new surgeries but keeps the old ones. There are many themes that will affect what injuries you will be treating, but my favorite ones are Hell’s Kitchen and Makeover Madness. Hell’s Kitchen mostly deals with fires and food-related injuries while Makeover Madness involves unattractive injuries like boils and stray hairs. The Field Hospital is a great place if you’re looking to relax.
Zombie Catchers is a very fun game where a robot named Bud and an alien named AJ capture zombies to create a business empire. These zombies are placed in Squeezers where their body fluids are extracted via squeezing and turned into food or drink items. Weird, I know. The humans buying these products are oblivious to what the items are actually made of despite some of them having zombified names and possibly foul tastes. The funny thing is that the zombies are actually afraid of you, possibly because you are not playing as a human. You primarily capture zombies using a harpoon gun, but there are other weapons as well. My favorite weapon is the Tesla Gun. It is a weapon with a Tesla coil at the end. When fired, the gun shoots a ball of electricity that electrocutes zombies. When a single zombie is hit, all adjacent zombies are also hit, with armor being penetrated and destroyed completely in just one hit. This makes the Tesla gun the most useful weapon in the game.
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I am no longer using WP. Please PM me if you want to talk.