Yes, there are likely some out there. The RWBY fandom is quite creative and there are numerous fanfictions exploring different character relationships. However, the quality and nature of these can vary widely.
A good 'gamer Roman Torchwick fanfic' should have an accurate portrayal of Roman's character. His charm, cunning, and flamboyance are key traits. Also, the gaming aspect needs to be well - defined. Whether it's the type of games he plays or the rules within the game world.
One interesting 'rwby roman torchwick fanfiction' could be about his early days as a criminal. It might explore how he got involved in the seedy underworld and formed his crew. Maybe it shows his first big heist and how he started to gain a reputation.
The contrast between their characters. Roman is a sly and somewhat villainous character, while Ruby is a young, idealistic hero. This contrast can create really interesting dynamics in a fanfiction, like a battle of wits or an unexpected alliance.
One great 'gamer Roman Torchwick fanfic' is 'Roman's Virtual Ascent'. It takes the character of Roman Torchwick and places him in a virtual gaming world where he has to use his wits and charm to climb the ranks. Another interesting one could be 'Torchwick's Gaming Gambit' which focuses on his strategic thinking in various in - game scenarios.
One plot idea could be Roman Torchwick getting transported to a different universe, like a modern-day Earth. He could use his skills to try and take over the criminal underworld there. Another could be a crossover with a superhero universe, where he teams up with a villain from that world to cause chaos. Maybe he could also cross over into a fantasy realm and try to steal magical artifacts.
Some RWBY - related forums might also have links to great 'rwby roman torchwick fanfiction'. The fans on these forums often share their favorite stories, and since they are RWBY fans, they might have some really good recommendations for Roman Torchwick - centered fanfictions. You can also ask for recommendations on these forums if you don't find what you're looking for right away.
In a harem aspect, it allows for different character interactions. Roman Torchwick could have various relationships with the different characters in the harem. Each relationship could develop in its own way, with different personalities and backstories of the harem members creating diverse and engaging plotlines. For example, one character in the harem might be a tough fighter who challenges Roman, while another could be a more gentle and supportive character.
One interesting character to pair him with could be Loki from the Marvel universe. They both have a knack for trickery and causing chaos. Another option could be the Joker from Batman. Their different styles of madness could create some really wild interactions. Also, pairing him with Alucard from Hellsing would be cool. Roman's human cunning against Alucard's supernatural powers would make for an exciting dynamic.
You can try searching on fanfic websites like Archive of Our Own or FanFiction.net. Just use the keywords 'Roman Torchwick' and 'harem' in the search bar, and you might find some relevant stories.