1. Altered Beast
   Portal
2. Golden Axe
   Diablo

Portal was certainly a sleeper hit when it came out but is now recognized for the incredible game it is. Gladdos, the end boss, certainly makes you use every little trick you have learned during the game to win.

1. Mike Tyson's Super Punch-Out
   Pokemon Red, Blue and Yellow
2. Diablo
   Donkey Kong

Catching Mewtwo in Pokemon Red, Blue and Yellow was a massive challenge. Mewtwo's physical attack just ate through your deck. Persistence and perseverance were a necessity, or if you know the secret, catching Mewtwo took just a second.

1. Arkham Asylum
   Super Mario Bros
2. Diablo
   Dragon Age: Origins

The name may confuse you, as the Archdemon is a dragon. And what a dragon it is. Not only are you fighting the Archdemon, but a number of his forces as well. This is a tough battle but the sense of pride when finally killing this impressive foe is second to none.

1. Super Mario Brothers
   Diablo
2. Donkey Kong
   Mike Tyson's Super Punch-Out

One of the prime evils, Diablo is the main boss in the Diablo series which was first launched in 1997 by the legendary Blizzard company. Diablo has appeared in Diablo 1,2 and 3.

1. Diablo
   Street Fighter 2
2. God of War III
   Contra

It wasn't enough that you had to beat a range of other fighters to get to the end boss, in Street Fighter 2, you had to take down Balrog, who not only is quick but hits hard as well. Many quarters were spent in arcades trying to beat this boss.

1. Soul Calibur
   Mortal Kombat
2. Diablo
   Donkey Kong

Nightmare was a recurring boss in the Soulcalibur series of video games.

1. Bioshock
   Dragon Age: Origins
2. Metal Gear Solid
   Dark Souls

The Bioshock series is much loved by gamers. And what's not to like? This FPS is beautifully crafted and fun to play. Although Big Daddies are not end bosses, they prove a tough encounter each time you meet them.

1. The Legend of Zelda
   The Witcher III
2. Metal Gear Solid
   Doom

A truly classic boss that not only gave you an epic fight but managed to mess with your mind at the same time. Can you remember controls swapping around? And what about Mantis tell you information about data saved on your memory card? Brilliant!

1. Star Wars Battlefront
   The Curse of Monkey Island
2. Doom
   Wolfenstein 3D

OK, not an endgame boss but there is nothing that wakes up childhood Star Wars memories like taking on those walking mechanical camels, the AT-AT, in Star Wars.

1. Super Mario Brothers
   Diablo
2. Donkey Kong
   Mike Tyson's Super Punch-Out

Bowser, Mario's major adversary, first appeared in 1985's Super Mario Brothers. Bowser is the King of the Koopa, a turtle race also famous in the franchise. All he wants to do is kidnap Princess Peach and get rid of Mario ... forever.

1. Diablo
   Pokémon Red, Blue, and Yellow
2. The Witcher III - The Wild Hunt
   Contra

Contra is a much-loved arcade game that was ported to a number of gaming systems. The final boss, Red Falcon, certainly was tough to beat!

1. Super Mario Brothers
   Diabo
2. Mike Tyson's Super Punch-Out
   Donkey Kong

An boxing game from the late '80s, your final battle is up against old 'Iron' Mike Tyson himself.

1. Ghost Busters
   Golden Axe
2. Mike Tyson's Super Punch-Out
   Streets of Rage

This classic arcade game saw you take on the Marshmallow Man, just like the Ghostbusters movie. It may all look a little old now, but in 1984, this was all cutting edge.

1. Mortal Kombat 3
   Contra
2. Sunset Riders
   Phoenix

One of the toughest end bosses in the Mortal Kombat universe, Shao Khan has a range of attacks that will quickly have you on the backfoot.

1. Destiny
   Ghostbusters
2. Diablo
   Golden Axe

Golden Axe is truly one of the great arcade game experiences and one of the first to offer a 4-player option. The final boss, Death Adder, was a little bit of a letdown, however. He looked the same as some of the other bosses you fought during the game, except he was red in color.

1. Diablo
   Legend of Zelda: Ocarina of Time
2. God of War II
   Super Mario Bros

Just when you think you have defeated the final boss in Ocarina of Time, he respawns as a two-sword-wielding monster. The backdrop of broken ruins, thunderous skies flashing with lightning and a great soundtrack makes this relatively easy boss battle so worthwhile.

1. Legend of Zelda: Ocarina of Time
   The Witcher III - The Wild Hunt
2. Donkey Kong
   Mike Tyson's Super Punch-Out

The Caretaker appears in DLC for the Witcher III. It seems like the creators of the game took a look at Dark Souls and decided a tough boss fight was the order of the day. The Caretaker HITS hard, so dodging is a necessity and learning the timing of his attacks is crucial if you hope to win this boss battle.

1. Diablo II - Lord of Destruction
   Super Mario Bros
2. Donkey Kong
   World of Warcraft - The Frozen Throne

The final raid boss in the Frozen Throne expansion, the Lich King provides an epic fight that puts even the best raid clans to the test.

1. God of War II
   Space Invaders
2. Fallout
   Doom

Could a boss fight get any bigger (literally)? In this battle, Kratos has to take on the incredible Colossus of Rhodes. The game designers did an incredible job and it really feels like an ant fighting a giant.

1. God of War III
   Doom
2. Star Wars Battlefront
   Altered Beast

Not the final boss in Altered Beast, but certainly one of the coolest. What's not to love about Aggar, he throws his face at you!

1. Diablo
   Contra
2. Doom
   The Curse of Monkey Island

The Monkey Island franchise from Lucas Arts gave the gaming world a totally different gaming experience. This adventure's final boss was the dread pirate LeChuck, well a giant robot version of him.

1. Minecraft
   Donkey Kong 64
2. Doom
   Diablo

In the beginning, Minecraft was certainly an open, world-building sandbox but more content was added over time, even an end boss in the Ender Dragon. Getting to the Ender Dragon, however, is another story...

1. Super Mario Brothers
   Diablo
2. Donkey Kong
   Mike Tyson's Super Punch-Out

Of course, Mario was introduced to the world in the first Donkey Kong game but he didn't even have a name. His adversary did - the feared Donkey Kong, who has become a Nintendo legend.

1. Contra
   Wolfenstein 3D
2. Donkey Kong
   Castlevania

Dracula has starred in many games before, but in the Castlevania Series, he is the main adversary.

1. Borderlands
   Diablo II - Lord of Destruction
2. Contra
   Phoenix

Although Diablo is the main boss in the Diablo series, Baal makes an appearance in the Diablo II expansion, Lord of Destruction. His ability to call on multiple waves of monsters even before you can touch him makes him a formidable opponent.

1. Destiny
   Phoenix
2. Ghost Busters
   God of War II

One of the first boss fights ever in a video game, the Mothership in Phoenix took up most of the screen. And so boss battles were born.

1. Mike Tyson's Super Punch-Out
   Diablo
2. Pokemon Red, Blue and Yellow
   Doom

One of the first FPS games ever made, Doom was ridiculously popular and went on to become a movie starring the Rock.

1. God of War II
   Fallout
2. Contra
   Dark Souls

One of the toughest games ever made, every boss in Dark Souls will kill you time and again until you work out ways of beating them. The final bosses, Ornstein and Smough, well, they just made you want to give up!

1. Doom
   Portal
2. Soul Calibur
   Ecco the Dolphin

A popular arcade game, Ecco the Dolphin had one incredibly difficult final boss in the Vortex Queen. One wrong move and you were inserting another quarter...

1. Ecco the Dolphin
   Donkey Kong 64
2. Wolfenstein 3D
   Contra

A boss battle that takes place in a boxing ring ... seems about right. And King Krusha K Rool was a formidable opponent.

1. Ghost Busters
   Golden Axe
2. Borderlands
   Minecraft

Borderlands is a much-loved FPS from 2009. The final boss, Mothrakk offers an extremely tough encounter to end the game. With the ability to fly, Mothrakk can have you pulling your hair out!

1. God of War III
   Castlevania
2. Doom
   Donkey Kong

The God of War series pits you against a range of difficult bosses, none more so than Poseidon in the third installment of the franchise.

1. Donkey Kong
   Diablo
2. Contra
   World of Warcraft

A four-stage encounter, Ragnaros is an extremely tough boss fight in World of Warcraft.

1. Doom
   Contra
2. Street Fighter 2
   Streets of Rage

It's only fair that when facing the hordes of hell, the final boss is going to be a demon right? Well in Doom, Cyberdemon gave the Marine one hell of a fight.

1. Dark Souls
   Batman: Arkham Asylum
2. Pokémon Red, Blue, and Yellow
   Wolfenstein 3D

Batman has had to face some tough bosses in his time, but the Scarecrow is one of the most difficult and mind bending.

1. Portal
   Mortal Kombat
2. Sunset Riders
   Streets of Rage

There was much controversy regarding Mortal Kombat when it was released in the early 1990s, especially with finishing moves. The game became an epic, and Goro, the four-armed Mortal Kombat champion, was featured throughout the series.

1. Altered Beast
   Mortal Kombat 3
2. Minecraft
   Doom

A spider with chain guns? Yes, that's Spider Mastermind from the original Doom. Best to get in close and behind him... easier said than done.

1. Contra
   Golden Axe
2. Diablo
   Phoenix

For those who played 1997's Diablo, memories of the Butcher remain. Although a mini-boss, the Butcher was brutal and without any prior knowledge, invariably, your character died at his hands.

1. Metal Gear Solid
   Fallout
2. Rage
   Diablo

There is no denying that the Fallout series has produced some incredible game moments ... and bosses. The Master from the original Fallout, however, gave players an extremely tough encounter to finish off the game. Of course, Fallout gives you many options, so you need not even fight him but that means you join him and become his mutant slave for life.

1. Golden Axe
   Bioshock
2. Destiny
   Sunset Riders

Although Destiny got mixed reviews when released in 2014 (some call it too grindy), it is an epic game. Atheon, the first raid boss your crew will encounter, provides a tough but very rewarding battle should you managed to bring him down.