To prevent infiltrators and disruptive player groups from ruining a season's progress in Last Fortress: Underground, alliance leaders must restrict administrative permissions for new arrivals and enforce external background checks before granting power. Your immediate action when receiving new members or merging groups is to place all incoming players into a strict probationary status without management rights.
Identifying Group Infiltration Red Flags
Bad actors typically display specific behavioral patterns during group transfers or server migrations. Watch for these early indicators before handing over leadership roles:
- Communication Exclusion: Incoming groups refuse to join your primary Discord or central alliance chat hub, preferring private channels to coordinate separately from your leadership team.
- Rapid Role Requests: New members demand officer titles or kick permissions under the pretext of organizing operations or improving efficiency.
- Diplomatic Sabotage: Recruits initiate unprovoked aggression against established allies or attempt to rewrite long-standing non-aggression pacts without leader approval.
- Dividing the Membership: Transfers create an "us versus them" narrative to pit long-term members against management.
Onboarding and Vetting Protocols
Replace open recruitment with a multi-step onboarding workflow to verify that incoming groups do not have a history of seasonal sabotage or broken diplomatic agreements.
- Request Server History: Require group leaders to share their previous server number and alliance background before accepting their join requests.
- Contact Former Allies: Reach out to diplomatic contacts on their previous server to ask if the migrating group caused diplomatic friction or broke agreements.
- Mandate Central Registration: Ensure every member joins your alliance's main communication server before granting any permissions in-game.
- Enforce Probationary Access: Keep recruits in basic member tiers where they cannot alter settings, promote players, or kick existing members during events.
| Access Tier | Permissions Granted | Requirements to Unlock |
|---|---|---|
| Probationary Member | Standard event participation, base shelter access | Mandatory chat registration, background clearance |
| Verified Member | Standard alliance participation, event participation | Proven reliability across initial seasonal milestones |
| Alliance Officer | Administrative controls, member management, diplomacy | Demonstrated loyalty, long-term operational alignment |
Responding to Infiltration and Power Shifts
If an integrated group attempts to destabilize your alliance, act immediately to neutralize their authority:
- Strip Management Access: Revoke officer status and administrative privileges from ringleaders the moment unauthorized actions occur.
- Remove Disruptive Leaders: Kick individuals who engage in unauthorized warfare against designated allies or actively ignore diplomatic directives.
- Maintain Operational Transparency: Explain the situation directly to your general membership. Share concrete reasons for the demotions or removals to prevent infiltrators from spreading false narratives or splitting your player base.
Free Last Fortress: Underground Codes
Current active codes and how to redeem them.
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Player Comments
128 players commented on this guide.
I wish I had read this before upgrading the wrong thing.
I tried this today and it worked better than my old setup.
Good guide for Last Fortress: Underground players. The strategy part was useful.
Can you add more details about strategy in a future update?