Brings back some old memories and...
I Can totally relate this to a video game! Not a specific one though but just scenes in my head, the Theme would be a fight to get to the Final Boss with just the Main character who's main weapon would have to be something like a sword.
0:01-0:24 Mission Starts
0:24-1:50 Hundreds of Enemies appear and surround you as you get into an epic fight for your life
1:50-2:00 you stop to rest nearly on you knees gasping for air while looking around at your defeated enemies, you heal yourself and stand up to move on
2:00-2:30 Boss appears and you begin to have a talk and refuse his offer to join him
2:30-3:30 You get into an epic fight with the boss and kill him in an awesome way
3:30-End of song, boss evaporates you wipe the sweat off your forehead and look up to the skies and the credits begin showing fun times your character had in the past with his friends and upcoming battles with your friends behind you but happy and looking for another fun tomorrow.
All this was made off the top of my head and I'm not sure if that helps but This is truly an amazing song!