Two Players Online on One Xbox 360 Console? Not Possible

No. Xbox 360 architecture allows one signed-in profile per console session for Xbox Live access.

• Gold Subscription: Tied to the profile. Only that profile gets Gold benefits (multiplayer, party chat, deals).
• Second Controller: Can sign in as Guest (offline profile) → Play local split-screen only. Guest cannot join Xbox Live parties, matchmaking, or earn achievements.
• System Link: Same — only host profile authenticates; guests are local-only.

Xbox One / Series X|S Difference

Modern consoles support multiple simultaneous sign-ins (up to 8 profiles). Each needs own Gold/GPU for paid multiplayer, but F2P works for all. 360 cannot do this.

Workaround for 360

• Two consoles (System Link via Ethernet/Router or two Gold accounts on Live).
• PC + 360 cross-play? No cross-play for 360 titles.

For same-couch online co-op on 360: Impossible. Use two consoles or switch to Xbox One/Series.