Version 1.6.4 Update • The Weekly Spending Ranking has been added. Compete by spending the designated currency, earn Ranking Coins based on your rank, and use them in the shop. • Normal Stages 361–400 have been added. • The August Bingo and Board events begin. • Reincarnation Sorcerer returns with growth missions and dedicated packages. • Mercenary revival chance has increased from 15% to 20%, while the Hero ATK bonus on revival has increased from 2–5% to 3–6%. • The August Season Pass begins.

Improved overall app stability through server optimization and bug fixes.

[English] 1.6.1 Update - Normal stages 331-360 have been added. - July Bingo and Board events will run together. - If you receive a skin you already own from the Season Pass, you will receive 1,000 Diamonds instead of a duplicate skin. - Fixed an issue where Multi Mode records could be saved abnormally due to a bug, and strengthened validation before records are reflected in rankings. - Improved stability for cloud save data and battle result saving.

- Fixed an issue where Guild Shop rewards could differ from the item shown. - Improved Multi Dungeon and invite-code matching stability. - Improved battle result saving, Auto Pack, equipment data, and mail reward stability. - We apologize for issues after the recent server overhaul. We will keep improving for more stable service.

We've revamped our server environment! The servers have been fully overhauled for a more stable and smoother experience. • Improved server stability • Faster connection and response times • Overall gameplay optimization Thank you for playing — more improvements are on the way!

Update Notice Hello, this is Underguild: Offense. We would like to inform you about the 1.5.3 update. 1. New Content - Defense Map 「The Last Campfire」 · A new defense map 「The Last Campfire」 has been added. · Defend the campfire at the center of the map! The game ends when its HP reaches 0. · Monsters grow stronger over time, and the longer you survive, the higher your ranking score. 2. Event Change · The Bingo event has ended, and a new Board Game event begins. 3. Bug Fixes and Stability · Fixed an issue where the virtual joystick only worked in part of the screen on wide displays such as foldables and tablets. · Fixed an issue where the size and background of some popups (Multi Dungeon matching, Hero Growth/Info, etc.) broke depending on resolution. · Fixed multiple Guild/Co-op Dungeon issues (wrong mercenary being sent, end-of-game handling on leave/death, boss HP bar and death display, Ninja clone not holding a weapon, etc.). · Fixed an issue where the Red Feather buff of 「Valkyrie of the Red Wings」 was not applied immediately to the hero and mercenaries. · Fixed Sewer Creature enhancement exceeding its maximum, the Hero Growth mission completion display, and some country icon display errors. 4. New Season Pass Skins (2) · 2 new skins have been added to the Season Pass. · 「Light Bulb Robot」 New Skin · 「Necromancer」 New Skin 5. Hero Balance Adjustments [Buff] Light Bulb Robot · The Lv.10 additional ability's static shock now hits up to 4 nearest enemies at once, instead of just 1. · The number of batteries needed for a full charge has been reduced from 6 to 5. · A new effect has been added to the Lv.3 additional ability: while fully charged, Critical Rate +15% and Critical Damage +50%. [Buff] Necromancer · The chance to summon a small skeleton soldier has increased from 5% to 6%. · The summoned small skeleton soldier's HP and ATK have increased from 20% to 40% of the hero's. [Nerf] Ninja · The duration of clones created from barrels has been reduced from 20 to 15 seconds. We will continue to provide a more enjoyable gameplay environment. Thank you.

[1.5.2 Update] 1. New System: Hero Support System - Equip owned heroes into "Support Slots" to grant a global passive effect to all heroes. - Slots unlock progressively based on the number of heroes owned. (2 / 4 / 7 / 10 / 14 / 18) - The effect grade scales with the equipped hero's level. - Global damage increases as more heroes are equipped. 2. Renewed: Item Slot Enhancement - The enhancement system has changed from per-item to per-slot enhancement. - All items equipped to the same slot share that slot's enhancement level. (e.g., enhancing the Weapon slot to +5 applies to all weapons owned.) - Gold and Enhancement Scrolls previously spent on items have been fully refunded. A refund popup will appear on your first lobby entry. 3. Stage Expansion - Normal Stages expanded from 300 to 330. 4. Hero Balance [Red-Winged Valkyrie - Lv.3 Ability Changed] - Before: Red Feather buff grants Hero+Mercenary HP +30% (max 1000%) - After: Red Feather buff grants Hero+Mercenary ATK +30% (max 1000%) [Spider Queen - Poison Effect Changed] - Before: Web contact applies poison for 5 sec, dealing 100% ATK damage per second (500% total) - After: Web contact applies poison for 5 sec, amplifying all damage taken by +250% (3.5x damage taken) 5. UI Improvements - Fixed the in-game "Rally" button overlapping with other UI when multiple synergies are active. - Fixed resolution display issues on some popups. 6. Bug Fixes - Fixed minor probability display errors. Thank you for playing!

1.5.1 Update 1. New Hero - Spider Queen A new hero leaves webs while moving, slowing and poisoning enemies. Defeated poisoned enemies summon Lesser Spiders and Explosive Spiders. 2. 3 New Season Pass Skins Spider Queen, Greedy Dragon, and Dwarf skins have been added to Season Pass rewards. 3. New Content - Daily, Weekly, and Achievement Quests Daily and weekly missions plus permanent achievements have been added. 4. User Settings and Equipment Saved to Server Options and equipment are saved to the server and preserved across device changes. 5. Balance and Quality-of-Life Improvements - Ninja balance adjustments - Improved readability of Box probability display

[UnderGuild: Offense] April Update - Compensation event added - Daily Shop Unique and Legendary Sewer item prices reduced - Guild Package removed - Piggy Bank package added - Barrel Warrior Dwarf level 10 ability adjusted

[New Content] · Stage Expansion: New stages added up to floor 300. · Legendary Hero Pass: A new pass dedicated to Legendary Heroes is now available. (15 reward tiers per pass) · Friend Invite Rewards Expanded: New tiers include Sewer Creature Pipes, Item Boxes, Random Heroes, Sewer Cube Selectors, Random Sewers, and more. [Hero Balance — Global Changes] · "All Heroes & Mercenaries ATK Up" buff now applies as a separate, independent multiplicative modifier. · "Legendary Mercenary ATK Up" effects now apply to both Legendary + Mythic mercenaries, with independent multiplicative calculation. (Joker, Platypus, Necromancer, Mischievous Demon) [Hero Balance — Individual Adjustments] · Reincarnation Sorcerer: Revive ATK 1~3% → 2~5%; Lv.3 extra summon 10% → 25% and now any common mercenary · Brave Green Slime: Jelly/Jelly Bomb buffed; new Bleed effect added · Cactus: Thorn damage 100% → 300%; new Bleed effect added · Light Bulb Robot: Full-charge ATK / ATK speed / Static damage all buffed · Joker: +10% on merge; barrel break ATK speed now applies to all mercenaries (+50%) · Platypus: +5% on merge · Necromancer: +3% per skeleton · Mischievous Demon: 100% guaranteed promotion on barrel break; All-ATK buff +5% → +15% [Bug Fixes] · Fixed: some item sub-options not being applied · Fixed: "Clear 120-minute mission" condition not triggering correctly · Re-fixed: heroes not reviving in multiplayer mode · Fixed: ghost mercenaries occasionally stuck on obstacles · Fixed: resolution display issue on Galaxy Z Flip · Fixed: error related to the new Ninja skin

[Underguild: Offense] April 1 Update - New Hero: Merciless Glutton Dragon added - Season Pass: New season pass and limited skins added - Event: Bingo event ended, Board event started - Balance & System: Early wave monster attack reduced, Vietnamese/Russian added

Fixed an issue where rankings for some players were not being properly registered on the leaderboard.

Bug Fix * Fixed an issue where some synergies were not working as intended.

Mercenary Combination Rework The combination requirements for Legendary and Mystic mercenaries have been greatly reduced.

* Added 10 new Mercenaries * Added 5 new Synergies * Added the Event Pass system * Buffed some Legendary / Mythic Mercenaries * Adjusted balance for several Synergies * Adjusted Tavern Barrel rates

What’s New • New Hero Added – “Mad Scarecrow” A powerful new hero has joined the battlefield. • Mercenary Revival Time Adjusted Normal: 10 seconds Legendary / Mythic: 15 seconds • Guild Improvements - Guild donations can now be selected from 1 to 10 times - Fixed an issue where diamonds were deducted incorrectly - Guest accounts can no longer create or join guilds - Guild buff information has been improved - Guild security has been strengthened • Multiplayer & Combat Improvements - Revive ads removed from multiplayer mode - Fixed guild attempt deduction issue in co-op - Effects now apply immediately after clearing a room - Added safeguard for 2x reward when Ad Removal is active • Quality of Life Updates - Added inventory presets (up to 5) - Enhancement quantity can now be selected directly - Added sewer creature filter - Mercenary ownership count now displayed in combination popup • Map Fix - Fixed abnormal extraction spawn in Tarkov map

Update Notice Hello, this is UnderGuild: Offense. Here are the details of the latest update. 1. New Guild Content Added A new guild content has been added for you and your guild members to enjoy together. Cooperate with your guild members and earn a variety of rewards! 2. Stage Expansion The maximum stage has been expanded to Stage 250. Challenge yourself against even more powerful enemies! 3. Increased Item Drop Rate in Ranking Dungeon The item drop rate in the Ranking Dungeon has been increased. You can now obtain rewards with higher chances than before. We will continue to bring you more exciting content. Thank you.

This update includes hero balance adjustments, growth system improvements, new content, and various bug fixes. [Update Details] • Valkyrie hero has been buffed. • Individual Rare/Unique mercenary attack stats have been removed and merged into [Normal/Rare/Unique Attack]. • New dungeon [Crocodile Swamp Cleanup] has been added. • Fixed issues related to quests and ranking dungeons. • Resolved display errors in Multiplayer mode and Jelly ranking. • Fixed an issue where mercenaries would not revive in certain situations. • Improved sewer level display. • Several items have been buffed. We will continue working to improve your gameplay experience. Thank you for playing!

This update includes hero balance adjustments, growth system improvements, new content, and various bug fixes. [Update Details] • Valkyrie hero has been buffed. • Individual Rare/Unique mercenary attack stats have been removed and merged into [Normal/Rare/Unique Attack]. • New dungeon [Crocodile Swamp Cleanup] has been added. • Fixed issues related to quests and ranking dungeons. • Resolved display errors in Multiplayer mode and Jelly ranking. • Fixed an issue where mercenaries would not revive in certain situations. • Improved sewer level display. • Several items have been buffed. We will continue working to improve your gameplay experience. Thank you for playing!

• Valkyrie hero balance has been improved. • The Growth page has been updated and mercenary attack stats have been reorganized. • A new dungeon, [Crocodile Swamp Cleanup], has been added. • Multiple issues related to rankings, missions, and mercenary revival have been fixed. • Sewer dungeon level display has been improved. • Several items have been buffed.

New Content - New Hero [Valkyrie of the Crimson Wings] has arrived - Clear exclusive missions after obtaining the new hero to earn additional rewards - Event update: Bingo Event has ended and the Board Game Event has begun Item & Progression Improvements - Item sub-options have been improved by adjusting unnecessary options and enhancing overall performance - Ability page slots have been expanded up to 225 - Ability page reset feature has been added Season & Content Expansion - The Season Pass has been reset and new skins have been added - Scrap Zone Search Party content has been expanded up to Stage 15 Balance Adjustments - Multiplayer mode difficulty has been slightly reduced - Item drop rate from bosses in Multiplayer mode has been increased Bug Fixes - Fixed an issue where Jelly Boss rankings were not calculated correctly Notice - New ranking maps and guilds are scheduled to be added in February!

[Update Notice] New Content & Balance Adjustments • New Content: Co-op mode added, new items, stage expansion up to 200, new skins, and sewer & creature content added. • Synergy Improvements: Two new synergies added and Robotics synergy enhanced. • Quality of Life: Improved item UI and easier growth access for sewers & creatures. • Balance Adjustments: Overall hero and sewer & creature buffs, some mercenaries buffed, and Red Room Reaper nerfed. • Bug Fixes: Fixed mercenary duplication and item summon issues.

Update Notice • Added a feature to reset item levels. • Stage EXP gain has been reverted to the previous values. • Optimized batch item synthesis and batch selling.

Update Notes * A new Robotics Shop event and the new Rainbow Robotics synergy have been added. * 7 new mercenaries have been added. * Fixed an issue where mercenaries did not revive in certain situations. * Fixed a crash issue that could occur during long play sessions with many mercenaries. * The maximum number of items for bulk equipment fusion has been adjusted to 100. * Abilities of the Reincarnation Mage, Brave Green Slime, and Cactus heroes have been enhanced. * Stage experience gain has been slightly reduced. * The boss timer has been increased from 1 minute 30 seconds to 3 minutes. * The mercenary limit in Special Dungeons has been increased from 6 to 12. * Mercenary page and skin page UI have been improved. ---

• Fixed an issue where in-app purchase rewards were not properly granted. • Improved auto-battle AI for smoother and more efficient combat.