No, it is not Stein's Gate.

As for the second question, it's a fairly obvious question if and only if you're in that particular fandom. ^^

5. What video game features a linear storyline that is also branched, and deals with moving through time and space?
Hmmmm, it's not Stein's Gate? How about Chrono Cross?

9. What anime character is famous for being awesome?
Hm, I don't know about that fandom so I guess my only choice is guessing randomly then. XD
Lelouch from Code Geass?

Chrono Cross is getting closer, but it's not correct.

Also, you probably won't get it correct if you're just randomly guessing haha, if you're not in the fandom there's a very small chance you even know the character. xD

Oh, I know! Chrono Trigger! =D

Well, I guess my only choice is to give up then. XD

Still no, haha. It's in roughly the same genre, though? I think, I don't know too much about the Chrono games.

Is it wrong? :O (Hm, is it from a game I've never played before...I'll have no chance to guess it if that's really the case)
I guess I'll have to give up from this question too. XD

Yeah, it's wrong. The game I'm thinking of isn't one most people have heard of before, but it's definitely in the same area as the Chrono games. Not related at all to that series, though.

Same area? Did you mean it's also a RPG?

Yeah, it's an RPG. No doing research, though! ; w ;

Relax, if I'd to do research, I'd have done it at the start. :)
Well, I actually did some search on the internet because I didn't read the rules properly at the start, but believe me I didn't search anything about question question 5, 9, and 16 because it's either too obscure or I think I know the answer.

So to be honest, I really have no idea what game are you talking about because most games I played are from PSX and computer. I've played some games from other consoles using emulator though.
I think I had told you all games I played that related to time travel. There might be some games I'm missing but I can't remember it. f(^^; )