Here are 50+ Halloween costume ideas for guys, ranging from classic, spooky to pop culture-inspired outfits:

Classic Halloween Costumes:

1. Dracula – Cape, fangs, and blood.
2. Frankenstein's Monster – Green skin, bolts, and tattered clothes.
3. Zombie – Torn clothes, fake blood, and makeup.
4. Werewolf – Furry gloves, fake fangs, and ripped clothes.
5. Skeleton – Black outfit with a skeleton print.
6. Ghost – A simple white sheet or ghostly makeup.
7. Mummy – Wrapped in bandages or gauze.
8. Grim Reaper – Black cloak and a scythe.
9. Phantom of the Opera – Half mask and a suit.
10. Mad Scientist – Lab coat, wild hair, and goggles.

Superheroes:

1. Superman – Blue suit with a red cape and 'S' symbol.
2. Batman – Dark cape and mask with a utility belt.
3. Spider-Man – Red and blue web-slinging suit.
4. Captain America – Star-spangled suit and shield.
5. Iron Man – High-tech armor suit or just the mask.
6. The Hulk – Green body paint and ripped clothes.
7. Thor – Armor, cape, and hammer.
8. Wolverine – Claws, leather jacket, and facial hair.
9. Deadpool – Red and black suit with weapons.
10. The Flash – Red suit with lightning symbol.

Pop Culture Characters:

1. The Joker – Purple suit, green hair, and chaotic makeup.
2. Harry Potter – Glasses, wand, and a Hogwarts robe.
3. Jack Sparrow (Pirates of the Caribbean) – Pirate hat, sword, and messy hair.
4. Darth Vader – Black cloak, helmet, and lightsaber.
5. Indiana Jones – Brown fedora, leather jacket, and whip.
6. Walter White (Breaking Bad) – Bald cap, glasses, and a hazmat suit.
7. John Wick – Black suit, tie, and slick hair.
8. The Mandalorian – Full armor and helmet.
9. Pennywise (It) – Clown costume with terrifying makeup.
10. Rick (Rick and Morty) – White lab coat, blue hair, and ray gun.

Historical and Mythological Characters:

1. Gladiator – Armor, sword, and sandals.
2. Viking – Fur, helmet with horns, and an axe.
3. Greek God (Zeus) – White robe, beard, and lightning bolt prop.
4. Pharaoh – Gold headpiece, royal robe, and staff.
5. Samurai – Armor or kimono with a katana.
6. Robin Hood – Green tunic, bow, and arrows.
7. Knight – Shining armor and a sword.

Movie Villains:

1. Freddy Krueger – Striped sweater, hat, and glove with claws.
2. Michael Myers – White mask and blue jumpsuit.
3. Jason Voorhees – Hockey mask and machete.
4. Hannibal Lecter – Straightjacket or prison jumpsuit with a mask.
5. Ghostface (Scream) – Black cloak and white ghost mask.
6. Leatherface – Apron and a chainsaw.

Funny and Unique Costumes:

1. Guy in a Toga – Simple white sheet wrapped like a toga.
2. Tourist – Hawaiian shirt, cargo shorts, and a camera.
3. Lifeguard – Red shorts, tank top, and whistle.
4. Chef – White chef’s coat and hat with a spatula.
5. Inflatable T-Rex – Hilarious inflatable dinosaur suit.
6. Banana – Simple and funny banana-shaped costume.
7. Bob Ross – Curly wig, beard, and paintbrush.

Group or Duo Costumes:

1. Mario and Luigi – Overalls, mustaches, and hats.
2. Ghostbusters – Tan jumpsuit and proton pack.
3. Men in Black – Black suits, sunglasses, and neuralyzers.
4. Rick and Morty – Lab coat and ray gun for Rick, yellow shirt for Morty.
5. The Addams Family – Gomez or Uncle Fester with dark, gothic attire.

These costume ideas can work for both solo and group setups, making them versatile for different Halloween events!