Keyboard, mouse, and a full squad
PC is the most flexible platform for playing with friends - the biggest library, the most crossplay, and games that run from a cheap laptop to a high-end rig. The best games to play with friends on PC span every situation, so this list is ranked for range: how good the co-op or competitive play is, how easily a group gets in, and current price.
Our top PC pick is Helldivers 2 - four-player co-op with crossplay to PS5, and a perfect fit for a PC squad. Call of Duty and Deep Rock Galactic cover competitive and co-op respectively, Portal 2 and Terraria are the cheap-and-brilliant picks, and Fortnite and Rocket League are the free options everyone already has. Many of these are on Steam for free.
Because PC crossplays with so much, it's the ideal hub for a mixed group - a PC player can join almost anyone. If your friends are on PS5 or Xbox, check PS5 + PC crossplay for the games that bridge you.