Duke Nukem 3D
The 90s were an era of action heroes toting huge guns and blowing things up. Movies, TV shows and games embraced this idea, and nowhere was that more evident than in Duke Nukem 3D. You're the titular Duke, and you're armed to the teeth to take out an alien invasion. You'll find time along the way to spout one-liners and rescue helpless strippers. It's definitely a product of its era, but it's still a solid shooter.