Skull Up
Fan-made community wiki
This idle RPG is Efun's undead idle RPG where players collect Skellies, build teams, manage castle workers, and push through adventure modes. This wiki focuses on practical routes: codes, beginner progression, Skelly roles, tier notes, events, and upgrade choices.
Recent Updates
the game Beginner Guide: Master Early Progression Fast for Faster Early Progression
the game First Week Guide: Dominate the Undead Realm Fast for Faster Early Progression
the game Guide for Faster Progression, Teams, Skellies, and Daily Upgrades
the game How to Play Guide for Beginners, Teams, Resources, and Progression
the game Power Guide: Master the Undead Empire in 2026 for Faster Early Progression
the game Tips and Tricks to Dominate the Underworld Fast for Faster Early Progression
the game Beginner Tier List: Best Heroes for New Players (2026)
the game Character Tier List Guide for Skellies, Roles, Teams, and Updates
Start Here
Your Undead Idle RPG Journey
Claim Codes
Check the current source-captured code snapshot before spending early summons or diamonds.
Build a Stable Team
Learn how front-line pressure, support, burst damage, and faction synergy shape early clears.
Spend Upgrades Safely
Use the loss-free growth system to test Skellies without locking resources into one roster too early.
Track Events
Follow official event and maintenance notes so limited SSS and SSS+ windows do not surprise you.
Source-backed rewards
Active Codes
Current codes appear only when the validated active-codes artifact exists. Rewards and capture times come from the same runtime snapshot used by the Codes page.
SKULLDC1000Free the game rewards
UPDC2000Free the game rewards
WELCOME3000Free the game rewards
SKULLUP2026Free the game rewards
Popular Pages
Trending Now
the game Beginner Guide: Master Early Progression Fast for Faster Early Progression
Your essential the game beginner guide to resource management, team building, and daily systems for new players.
the game First Week Guide: Dominate the Undead Realm Fast for Faster Early Progression
Master the the game first week guide with proven tips to boost resources, unlock features, and build a powerful team.
the game Guide for Faster Progression, Teams, Skellies, and Daily Upgrades
A practical the game guide for progression, teams, resources, upgrades, and daily routines in the idle RPG.
the game How to Play Guide for Beginners, Teams, Resources, and Progression
Learn the game how to play with beginner steps for resources, Skellies, teams, upgrades, and daily progress.
the game Power Guide: Master the Undead Empire in 2026 for Faster Early Progression
Unlock the full potential of the game with this definitive power guide—optimize teams, master idle mechanics, and dominate the battlefield.
the game Tips and Tricks to Dominate the Underworld Fast for Faster Early Progression
Master the game tips and tricks to level up faster, optimize your team, and conquer every stage with smart strategy.
the game Beginner Tier List: Best Heroes for New Players (2026)
Your ultimate the game beginner tier list guide with top heroes, strategies, and player-tested tips to dominate early game.
the game Character Tier List Guide for Skellies, Roles, Teams, and Updates
A practical the game character tier list framework for roles, Skellies, team fit, and update-aware choices.
What is Skull Up?
The game is a mobile idle RPG and hero collector from Efun. The official store pages describe collecting over 60 Skellies, combining teams, managing undead workers, and earning offline rewards through idle systems.
The game emphasizes flexible growth. Store copy highlights resource refunds for upgraded Skellies, which makes it safer for new players to experiment with team roles while learning campaign and event priorities.
Explore All GuidesDeveloper
Efun Game Ltd. / EFUN PIONEER COMPANY LIMITED
Platforms
Android, iOS, iPadOS, macOS Apple silicon, Windows
Genre
Idle RPG, role-playing, card hero collector
Guide Modules
Jump into codes, beginner routing, tier notes, Skellies, team builds, events, and platform setup.
Codes
A compact codes snapshot for players who want to redeem current free rewards before pushing summons or upgrades. The module points to one runtime code page backed by the same active-codes artifact used by navigation and sitemap.
Beginner Guide
Start with a clean early route for tutorials, profile unlocks, first redemptions, idle worker setup, and safe Skelly upgrades. It keeps new players focused on systems that official store pages call out: team combinations, idle rewards, and loss-free growth.
Tier List
A practical tier-list hub for comparing Skellies by role, team fit, event access, and upgrade pressure. It avoids pretending every roster is identical and frames tiers around where a unit helps a real account.
Damage dealers that justify early resources.
Buffers, sustain, and control pieces that stabilize teams.
Units that shine in specific modes or events.
Skellies
A roster module for learning what Skellies do, how roles overlap, and why official copy emphasizes free combinations and smart strategies. Use it before spending major materials on a new pull.
Team Builds
Team-building guidance for campaign pushes, idle resource flow, and event rosters. The module helps players balance burst damage, frontline survival, support utility, and upgrade refunds.
Progression
Progression guidance for castle workers, offline rewards, upgrade loops, and resource timing. It focuses on the idle management systems that let accounts keep improving between sessions.
Events
A events module for following official maintenance, seasonal events, server merge carnivals, and limited SSS or SSS+ arrivals. It is built around the official site news cadence.
Platforms
Platform and download guidance for Android, iOS, iPadOS, macOS Apple silicon, and Windows availability. It helps players pick the right official store route and understand compatibility requirements.
Skull Up FAQ
Quick answers about Skull Up codes, Skellies, teams, events, and this independent wiki.
What is the game?
The game is an undead idle RPG and hero collector from Efun with Skellies, offline rewards, events, and flexible team building.
Does this wiki include codes?
Yes. The Codes page appears only when a validated active-codes artifact exists, and every code comes from the same checked runtime snapshot.
Is Wiki official?
No. This is an independent fan-made wiki and is not affiliated with Efun.
Ready to Master the Game?
Start with the beginner route, then compare Skellies, codes, event windows, and build priorities as your roster grows.