Halo 2 (2004) is a classic first-person shooter video game developed by Bungie and published by Microsoft Game Studios. The game was released for the Xbox and Microsoft Windows platforms in 2004 and was a huge success, selling over 8 million copies worldwide.
The game is set in the 26th century and follows the story of the Master Chief, a super soldier who is tasked with saving humanity from the alien Covenant. While the game is primarily focused on action and combat, it also contains some subtle sexual moments.
One of the most memorable sexual moments in the game is when the player encounters a female Elite character named Tartarus. Tartarus is a powerful enemy and is the leader of the Covenant forces. During the game, the player must fight Tartarus in a one-on-one battle. During the battle, Tartarus taunts the player with sexual innuendos and even makes suggestive movements with her body.
Another sexual moment in the game occurs when the player encounters a female character named Cortana. Cortana is an artificial intelligence construct and is the Master Chief's companion throughout the game. During the game, Cortana makes several suggestive comments and even flirts with the player.
Overall, Halo 2 (2004) contains several subtle sexual moments that add to the game's atmosphere and story. While these moments are not explicit, they are still memorable and add to the game's overall appeal.
A blue AI is visibly nude but no explicit nudity such as nipples, genetalia or buttocks are shown. There is no actual sexual content or nudity in this game or any other Halo games.
Like all Halo games there is no sex, not even sex references maybe some minor innuendos you'd hear in a G/PG rated film like Johnson saying "I know what the ladies like" as he mans a turret. Nothing beyond that, sexual content is pretty much non existent in the Halo games. Cortana has a slim body and is presumably nude but even then her buttocks, genitalia and breasts are completely covered as she is a hologram.
Early in the game, a male alien is stripped naked. No genitals or other intimate details are visible on him, and this scene is not sexual in any context whatsoever.