There are sometimes games allowing headphones, no camera, no mic. Occasionally there are games and game-masters who will allow a Player to LISTEN (so you hear everyone else who is talking) and allowing that one player to Type for their actions and speech. This kind of game doesn't slow down much, if the GM overlooks something the typer typed in the chat then usually one of the other players will verbalize it for you and catch the GM's attention, "Hey Steve said he wants to attack the goblin." So, you can look for Text Only games, but you can also enquire and ask the GM of a voice or voice+video game, asking if they would mind if you type so long as you're able to hear the others. As GM I've allowed it and also tried it as a player. You don't have to give a detailed reason, just "Hey GM, I don't have a mic or don't want to broadcast my voice, would I be able to participate in this game and play by listening and typing?"