I-0 is most famous for its adult content, and I put off playing through it. However, Cadres claimed that all adult content could be avoided, and he is right.
This game is easy and short. It has many distinct branches, none of which require adult actions. You try to make your way back home, encountering cops, taco shop employees, creepy and dangerous men, etc.
The NPCs can be fairly static, most notably the Junta girl. Overall, if the game didn't have juvenile sexual content, I would recommend it as a quick fun game. But I don't. However, I do recommend Narcolepsy, a game set in the same setting and also featuring Tracy. It also branches, and if you call your sister before doing anything else, you can avoid any sexual content and have a great game.