It looks like you're having some issues with RoboCop: Rogue City and have a few questions about the game. Let me help you out!

Firstly, regarding your question about the endings, it's possible that you may need to revisit your previous choices to unlock the better ending options. Since there are three endings in total, make sure you've explored all the story paths and made different choices to see if that unlocks the third (better) ending.

As for the issue with running the game, I'd suggest checking a few things:

1. Make sure your PC meets the minimum system requirements for the game.

2. Check for any updates or patches available for the game and install them.

3. Try closing other resource-intensive programs or background applications to free up CPU resources.

4. If you're using a graphics card, ensure it's compatible with the game and try adjusting the graphics settings to see if that improves performance.

Regarding the demo's performance issues, it's not uncommon for demos to have some technical limitations. However, if you're experiencing hitching or stuttering in the full version of the game, it might be worth checking the game's forums or online communities to see if others are reporting similar issues and if there are any known solutions.

Lastly, I noticed that a Nintendo Switch version was initially announced but later canceled. If you were looking forward to playing on Switch, that's disappointing news!

I hope this helps address your questions and concerns about RoboCop: Rogue City! Let me know if there's anything else I can assist you with.

Instaling RoboCop: Rogue City