In GTA 5 Online, missions are designed for multiplayer, but there are still ways to enjoy similar mission-style gameplay in single-player: 1. Use Story Mode MissionsThe closest official single-player experience is GTA V’s Story Mode, which already includes structured missions, heists, and side jobs similar to Online content. 2. Play Contact Mission-like Activities (Solo)Some Online activities can be played alone or with matchmaking disabled: Security contracts (if available in your version) Time trials Freemode challenges 3. Use Solo-Friendly JobsCertain missions can be started in invite-only or solo sessions, letting you play without other players interfering. 4. Mods (PC only)On PC, players sometimes use mods to simulate Online missions in single-player—but this is unofficial and not supported by Rockstar in Online mode.