Red Dead Redemption Cheats in Multiplayer? No.

Cheats are completely disabled in Red Dead Redemption multiplayer (Free Roam / Competitive). They function only in Single Player.

Why

• Fairness: Infinite ammo, health, Dead Eye would break PvP/Free Roam balance.
• Technical: Multiplayer runs on dedicated servers (Rockstar Cloud). Client-side cheat flags are ignored; server validates all state.
• Anti-Cheat: Rockstar's heuristic detection flags modified memory / impossible stats → permanent ban (Social Club + Console).

Single Player Cheats (For Reference)

• Enter via: Pause → Settings → Cheats → Enter Code.
• Examples: INFINITEAMMO, DEADEYE, GIVEALLWEAPONS, SUPERHORSE.
• Warning: Saving with cheats active disables Achievements/Trophies permanently on that save file.

Multiplayer Progression (Legit)

• XP/Rank: Matches, Gang Shootouts, Grab the Bag, Gold Rush.
• Legendary/Infamous Rank: Honor system unlocks outfits, mounts, titles.
• Outlaw Pass / Roles (RDO): Bounty Hunter, Trader, Collector, Moonshiner, Naturalist — grind gold/$/XP.

Play fair. The posse system and open-world encounters are the content.