Could be a single person, a group of people or an organization of some sort as long as they were meemorable to you in some way.
Here's my list:
1. Kefka (FF6) - the guy is bat-shit insane, a total freak, and his actions lack any motives.
2. Joker (Batman:AA) - Batman's #1 pain in the arse
3. The enemy AI (Pong) - that despicable paddle >:O
4. Sun Li the Great Strategist (Jade Empire) - to plan all that stuff for 20 years, what a douche.
5. The Wild Hunt (The Witcher) - group of freakin spectres who just wont give up on the protagonist. Such a persistent bunch.
6. GLaDOS (Portal) - an AI full of personality and malice. Gives me the giggles.
7. The Reapers (Mass Effect) - they were much more menacing on the first installment.
8. Andariel (Diablo 2) - never finished the game because i got bat-shit scared of her >.>
9. The Enclave (Fallout series) - i think no explanation is needed for this.
10.Majestic12 (Deus Ex) - the moth*fckin kings of conspiracies
There are many other that deserve special mention (e.g. Shodan, Irenicus, Bowser, Lechuck) but well the list will become tediouisly long.
Here's my list:
1. Kefka (FF6) - the guy is bat-shit insane, a total freak, and his actions lack any motives.
2. Joker (Batman:AA) - Batman's #1 pain in the arse
3. The enemy AI (Pong) - that despicable paddle >:O
4. Sun Li the Great Strategist (Jade Empire) - to plan all that stuff for 20 years, what a douche.
5. The Wild Hunt (The Witcher) - group of freakin spectres who just wont give up on the protagonist. Such a persistent bunch.
6. GLaDOS (Portal) - an AI full of personality and malice. Gives me the giggles.
7. The Reapers (Mass Effect) - they were much more menacing on the first installment.
8. Andariel (Diablo 2) - never finished the game because i got bat-shit scared of her >.>
9. The Enclave (Fallout series) - i think no explanation is needed for this.
10.Majestic12 (Deus Ex) - the moth*fckin kings of conspiracies
There are many other that deserve special mention (e.g. Shodan, Irenicus, Bowser, Lechuck) but well the list will become tediouisly long.