Games like UFO RPG : idle wars

Here are some great alternatives to UFO RPG : idle wars by Artifact games :
Alien Flying UFO Space Ship
Alien Flying UFO Space Ship
★3.2
Part Time UFO
Part Time UFO
★4.9
Space, Aliens & UFOs
Space, Aliens & UFOs
★3.8
Cosmic Combat: UFO Hunter
Cosmic Combat: UFO Hunter
★4.1
UFO Videos, News & more...
UFO Videos, News & more...
★4.4
Alien UFO vs NASA Game
Alien UFO vs NASA Game
★4.3
Find & Catch Alien UFO Games
Find & Catch Alien UFO Games
★4.4
UFO Sightings: Reports & Map
UFO Sightings: Reports & Map
★4.7
Photo Editor with Aliens UFO
Photo Editor with Aliens UFO
★4.9
UFO Stalker
UFO Stalker
★3.3
UFO RUSH : Alien invasion
UFO RUSH : Alien invasion
★4.2
UFO Grandizer
UFO Grandizer
★4.8
Extraterrestrial
Extraterrestrial
★4.6
Zap Attack!
Zap Attack!
★3.8
Off-Road FLY Edition
Off-Road FLY Edition
★3.9
Star Gems
Star Gems
★4.3