Great Game, but Some Violence and Gore.
These are some of the greatest games of all time. I loved all three of them. There is violence, gore and slight language in all of them, but nothing too bad.
Half-Life 2: Great game with an amazing story line. Some blood and gore (decapitating headcrabs, killing Combine soldiers, and minute amounts of blood coming from you and the enemies.) but it isn't very realistic since the game was made in 2004. The story may be kind of unsettling to younger children (an interdimensional organization that took over the world and brainwash the humans by contaminating their water), but i'll bet some of the books they read may be as bad. Also, Gordon Freeman (the person you play as) is a great role model. Some mild language like h*ll and d*mn but nothing too bad.
Portal: The perfect puzzle game to stimulate an even eight-year-old's mind! A very fun FPS where you use portals to navigate test chambers in an underground facility to finally make it to the computer that runs the facility and destroy her. In later test chambers, there are minigun turrets that when they manage to shoot you and you look behind you, you will notice that there is some blood on the wall. The way to destroy these turrets, though, is very funny. You can pick them up from behind and chuck them into the air and the turrets may even scream or shout "Hooray!" Also, there are minimal amounts of swearing like the very occasional "h*ell" by GlaDOS, the computer that runs the underground facility. Overall, very fun, brain-simulating puzzle game that I would definitely recommend you get!
Team Fortress 2: A fun FPS with a loony art style and online content so you can jump in with a mate and play the various collection of core and alternative game modes (the core game modes being more classic and realistic gameplay with situations that are in lots of other games and accurate to real life, and the alternative game modes having more wacky and "pass-time" features like one called pass time: a fun mashup of regular tf2 and soccer, hockey, or basketball. There's gore in this game similar to Half-Life but way more goofy and unrealistic, like spontaneously combusting upon death by rocket-launcher (while this requires some experience with computers, these gorey deaths can be turned off). There are moans of pain when hit by bullets or other projectiles, though. There's occasional swearing, like the Scout telling his teammates to "get on the point, j**k*ss*s!" but that is very occasional. You're not really supposed to rate online content, but I think it's important that younger children don't play online unless it's with a group of friends because there can be some weird people in the tf2 community. One of the characters you can play as, The Spy, spokes a cigarette, but I don't think that one would ever start smoking to be like The Spy from TF2.
Valve really isn't into consumerism, really. There are microtransactions in TF2, but not in Portal or Hal-life
This title contains:
Positive role models
Ease of Play
Violence & scariness