In Meet the Cores 2, Ego mentioned GLaDOS spending some time with him.

Humor Core has been telling jokes all the time.

Rose the Botanical Core blushed when she saw the Fact Core. So Rose showed Fact Core the beautiful plants and ecosystems, and it was dope, rather wonderful.

Some mild violence involving robots.

Fergus mentioned some dangerous red gel bouncing around the party in Christmas, killing so many people. Would be sad for young viewers.

The gel knocked Ego Core so hard, causing his good deed (even his badge he merited) to slip off the balcony.

Chuck zapped Ego Core, detaching him from the autorail. This would scare some more.

A corpse was seen on the old bed in Meet the Cores 2.

The red gel suddenly burst out of the tank, knocking Fergus off the autorail. Yikes!

Glitchy burns alive at the end of Meet the Cores 1.

Glitchy detaches himself off the rail and hit the floor because he wanted to fly. Nothing shown in graphic detail, we see a crack in his eye.

A turret core shot bullets at Atlas and P-Body, no blood seen.

Some infrequent uses of "hell", alongside the uses of 2 "damn", 1 use of "drive-shaft", and a couple uses of "crap"

"Bloody" has been used like many times.

In space, Wheatley shouted, "OH, FOR THE LOVE OF--!" and the scene cuts back to the cores when Wheatley is about to say an "S" word.

Constant uses of mild language (several uses of "hell", "damn", "crap", "arse", and 1 use of "driveshaft" alongside utterances of "freaking", "bloody", "darn", etc.)

"Hell" is much of a swear word some cores could use. It usually refers to an exclamation (like "holy hell", "what the hell", "as hell") and even is in reference to (or has to be said as) a place (as a notable metaphor).

The Omnisphere shouting in the booming voice would scare a lot.

A dangerous red gel mixed with repulsion and propulsion gels would be dangerous. Even worse, it's terrifying.

In the climax of Meet the Cores 3, Ego got multiplied by the machine. What an intimidating ending!

The red gel destroyed Dr. Alma's stuff in sight.

This might be an outdated PG-rating. It contains strong violence, mild language and name-calling, and a little bit of suggestive humor. This might receive a soft PG-13 rating.

A plant spat acid venom past Fact Sphere and to the tree.

Rusty was underwater in the toxic pool, analyzing the corpses, would be intimidating.

Anger Core in Android Hell would be too frightening.

Glitchy exploded twice. This is quite disturbing.

Rated PG for sci-fi action/peril, thematic elements, mild language, and suggestive content