I am wanting to purchase a pre-made zombie defense game where I can easily edit the characters, guns, bullet projectiles, zombie animations, etc. Is there a place on the forums or another website where I can purchase pre-made content from developers? Please let me know!
In the marketplace you can often find project templates, but you will find it impossible to find an entire game made for you. Your best bet is to take these templates and add your own characters. Fuze by mixamo (now under adobe) is a really good character creator and has zombie models.