Groups

 

Space aliens

Creatures theme

Features (sentient) extraterrestrial alien creatures.

Alternate name: Extraterrestrials

The first video game about Space aliens was released in 1971.

Sega, Electronic Arts and Activision has published most of these games

Constrast:
* Outsiders - aliens from another dimension
Sentience isn't very important limiter here, although preferable since alien animals/monsters are a bit different thing.

There may be some merit in having <i>sentient aliens</i> group to split this apart, but there should first be proof that there are enough cases where both _don't_ appear in the same game (which I find unlikely).