There is no CGI in that scene, it's actually puppetry.
Stop cherry-picking scenes to support your flawed logic, the Runner isn't huge, none of the movie aliens except the Queen are taller than 3 meters, I have absolutely no idea why or where you got the ideal the Aliens are huge when it's literally stated the original was just a bit over 2 meters tall.
Also, fancy seeing you trying to judge the way I type, unaware to your own terrible grammar lmfao
The suit in that pick is hanging from a wall lol, if you want to get people to take you serious, stop cherry picking images and taking em out of context to make shit up.
The original Alien is officially 7'2, the Aliens from the sequel are the same as they are meant to be the same height.
No game aside from Isolation had the basic aliens being taller than that.
Here are some few examples of Aliens being far smaller than what you claim they are
Also, before you try using this image, I'll let you know that Lambert is 5'6, while the Alien is 7'2
And incase you don't know what 7'2, that means it's 2 meter and 18 centimeters tall, far, FAR, far smaller than Isolation's 3 m tall Alien