Spoil a video game without stating what game it is.

Or using any of the character's names....

The main character sends Satan back to hell and is proceeded to be chased by a crazy axe wielding woman....

 

The protagonist kills the antagonist and her lackey and flies back home with his on and off (unofficial) girlfriend and mentor/best friend.

 

I know this one.

 

You get sucked into the villains belly and kill her soul.

 

Your family has been killed and now you must get revenge and join what you never knew existed and uncover a massive conspiracy.​

 

You defeat your brother and meet your father.

 

Also it doesn't have to be the end of the game. Just a spoiler

The cheerfully incompetent but loveable cop is the killer

 

Crap...i know this...
*looks at entirety of profile*
Nope. no clues there.

 

The Ishmael's "spirit" is shattered. This prevents him from passing a super important test.

 

A blue hedgehog defeats a caricature of President Theodore Roosevelt and rescues all the small animals he kidnapped.

 

you save the princess.

 

Your princess is in another castle~

 

You were dead all along.

 

Every JRPG before 1993.

 

That chick who was helping you out was, in fact, leading you to your doom! But it's okay! Her dismembered corpse is sucked into the vacuum of space. c:

 

Your best friend was a priness all along.

And I'm sure we all know where this is going.
/stab

 

The final boss is a guy in a red suit with black pants and glasses that looks like an egg that uses a machine to try and beat a hedgehog

 

Three days.

 

he used to be an adventurer like you, then he took an arrow in the knee.

 

Someone give me an arrow.

He ends up saving the senators by "killing" himself