The friend with no console is not out of the group
Every crossplay conversation assumes everybody owns a machine. Somebody in your group does not. They have a phone, they are interested, and every list they read tells them to buy a four-hundred-pound box first.
They do not need one. A handful of the biggest multiplayer games in the world run on a phone and connect to the same servers as the PS5, Xbox, Switch and PC versions, which means a mobile player is a full participant rather than a spectator. It is the cheapest way to add a person to a group, and it also solves the friend who is traveling, at work, or simply not near their console tonight.
Which games really bridge mobile - and the version trap
The mobile side of crossplay carries one risk the console side does not: a game appearing on the App Store under a familiar name is not proof it is the same product. Some franchises ship a separate, cut-down mobile build with its own servers, and those do not connect to anything. The name matches; the game does not.
The way to check is the same as everywhere else on this site - the developer's own page, not the store screenshot. Every pick below links its official listing. Where a game's crossplay depends on both sides running the same version, we say so in the table rather than rounding it up to a yes.
Minecraft is the one to start with
Minecraft Bedrock is the same game on a phone as it is on a console, and a phone player can join a world hosted on an Xbox, a PS5, a Switch or a PC without anything special being configured. For a group where one person has only a phone, this is the default answer and has been for years. Buy the mobile or console version - not the PC Java edition, which connects to neither. Our review covers that distinction properly.
Among Us is the free one, and the best pick when the group is bigger than four. It runs on phones, consoles and PC with full crossplay, scales to fifteen players, and works over a voice call rather than needing one - which is why it dominates our long-distance hub. Full review.
Fortnite is the largest crossplay network in gaming and the phone player joins the same lobbies as everyone else. Genshin Impact is the unusual one: free, gorgeous, with crossplay and cross-save, so the same account works on a phone during the day and a console in the evening. For a group where people drift between devices, that is a genuinely different proposition.