Online Games With Maximum Freedom ("Do Anything"): Sandbox, MMO, Survival, Social

No online game offers literal unlimited freedom—all have coded boundaries. However, these titles provide the highest degrees of player agency, creativity, and emergent gameplay:

Sandbox / Creative Platforms

• Minecraft (Java/Bedrock): Infinite procedural worlds, Creative mode (unlimited resources, flight), Survival mode, massive modding community, private servers (Realms, self-hosted).
• Roblox: Not a single game, but a platform of millions of user-created experiences (RPGs, simulators, shooters, social hangouts). Roblox Studio allows creating your own games.
• Garry's Mod: Physics sandbox with 20,000+ workshop addons. Build contraptions, roleplay (DarkRP, Star Wars RP), create gamemodes. Requires Source engine games (HL2, CS:S, TF2) for assets.
• Terraria: 2D action-sandbox with deep progression, building, boss fights, and massive mod support (tModLoader).

Persistent Worlds / MMOs

• Second Life: User-generated virtual world. Create/sell content (avatar, clothing, furniture, scripts), own land, run businesses. Economy converts to real USD (Linden Dollar).
• EVE Online: Player-driven sandbox MMO. Everything is player-made: ships, economy, politics, wars. Steep learning curve, true consequence.
• Albion Online: Fantasy sandbox MMO, full-loot PvP zones, player-driven economy, classless "you are what you wear" system.

Open World Survival / Exploration

• No Man's Sky: 18 quintillion planets, base building, freighters, multiplayer, cross-play. Massive updates since launch (Expeditions, settlements, mechs).
• Valheim: Viking survival, procedural world, building physics, boss progression, dedicated servers, heavy modding.
• 7 Days to Die: Voxel-based zombie survival, fully destructible/buildable world, horde nights, RPG skill trees.

Social / Roleplay Focused

• VRChat: Free social VR/desktop platform. User-made worlds/avatars (Unity SDK). Infinite variety: chill worlds, games, clubs, RP groups.
• GTA Online: Structured missions/heists, but "Freemode" allows chaotic sandbox play with friends (races, stunts, roleplay servers like FiveM).

Key Distinction: "Freedom" usually means creative tools (Minecraft, Roblox, GMod, Second Life) or systemic depth (EVE, Albion, Kenshi - singleplayer but relevant). Pick based on whether you want to build, roleplay, conquer, or explore.