If you're looking for anime similar to Cat + Gamer, you might like these titles.
A lady lives a quiet life with her two loves: alcohol, and her many cats. She’s had many of the latter over the years including an oft-grumpy Scottish Fold mix and Poko, an orange ball of energy who was abandoned as a kitten and saved to live another day. Whether the kitties are playing with cotton gloves, getting to know each other or causing mischief, they and the lady live happily together.
Liza Luna has been dispatched to Earth by the space empire Azatos. At first, she thought that it would be fine to destroy the Earth, since it has a low level of civilization. However, after stopping at a cafe, she encounters a cat and is shocked by her cuteness.
When Fuuta comes home tired at night, all he wants to do is spend time with his new cat. All the mysterious habits and mannerisms of house cats are carefully reproduced in this relaxed and cute comedy about living with an adorable furball!
What's Michael? Michael is a cat. A cat that is inexplicably attracted to the smell of raw fish, yet horribly repulsed by the smell of toothpaste. A cat that, in a dogfight with a fly, will strafe his master in her sleep. In short, Michael is a cat like any other cat.