Gaymers

Enemies to lovers speed run any %! Analytical and cold gamer needs the help of a bisexual artist he hates to develop his mobile game.
Cute, funny, sexy. This ones so good. Not much gaming but its the crux of the plot. (Also can't believe I havent added this to the list until now...)

Trapped in a Gacha game. MC is a summoner who 'controls' the hero he summons.

Gender gimmick. Catfish MC x crazy ML and by crazy I mean, damn he straight up does whatever he wants to the ML. Made me laugh in disbelief.

I added this one because of Lilysnows' suggestion.

It's a good one. MC is thrown into a video game, where he has to grant the wishes of his favorite character, the ML. The only game aspects are a status window and side quests. Arts good and the characters have a fun dynamic.

Gamer x (?)gaymer.
If you've ever played Mabinogi, this manhwa will hit you with all the nostalgia feels.
A long time player who is terrible at the game (Diva class) is picked up by a top ranking player with a (normally) antisocial persomality. I'm enjoying it!