Patch 1.5 – Mastery Mode, Online Co-op & Saved Builds

Hey!

Update 1.5 is here — and this is the biggest update so far.

This patch adds Mastery Mode, Steam online co-op, saved builds, the 15th upgrade row with ultimate skills, new arenas, Czech language support, and many gameplay, balance, and UI improvements.

Thanks again for playing and sharing feedback.

Mastery Mode

• Added Mastery Mode Mastery is a new long-term progression mode with its own levels, tiers, arenas, mutators, run rewards, and permanent upgrades.
• Mastery starts from level 0 Progression is designed around gaining Mastery EXP and spending Mastery points on permanent upgrades.
• Added Mastery tiers 1–5 Each tier increases difficulty and rewards.
• Added 5 Mastery arenas
• Basement Nest
• Cable Junkyard
• Swamp
• Port
• Neon Nest

Added Mastery contracts A Mastery run can be completed by surviving for 10 minutes or reaching the tier score goal.

Added Mastery mutators Mutators increase difficulty and EXP rewards, with effects such as swarms, stronger enemies, elites, damaged cables, energy leaks, and no rerolls.

Added Mastery gifts during runs During Mastery runs, you can choose temporary gifts every 120 seconds, with different rarities and rerolls.

Added permanent Mastery upgrades Spend Mastery points on long-term upgrades such as HP, damage reduction, energy, skill cost/cooldown, loot, EXP, and starting energy.

Added Mastery leaderboard Mastery now has a leaderboard based on total EXP.

Online Co-op

• Added online co-op through Steam You can now create and join Steam rooms, invite friends, use passwords, ready up, and start co-op runs together.
• Added co-op arena selection The host can choose the mission or arena before starting.
• Added player setup before the run Players can choose skins and builds before the game begins.
• Added separate co-op records and leaderboards Co-op missions now have their own score records.
• Added separate player resources Each player has their own HP, energy, active skills, cooldowns, status effects, damage handling, and HUD.
• Added co-op elimination and revive mechanics When a player dies, they can be revived through clicks.
• Added co-op-ready enemy targeting Enemy attacks, side effects, cables, projectiles, and damage effects are handled separately for the correct player.
• Status effects moved closer to the player Status effect panels now appear near each hamster, making them easier to track during co-op and regular gameplay.

Saved Builds

• Added saved builds system You can now create, preview, rename, delete, and select saved upgrade builds.
• Builds can be selected before runs Campaign and co-op now support choosing a saved build before starting.
• Campaign menu updated The campaign menu now supports build selection and shows skin icons more clearly.

Upgrade Skills & Ultimate Skills

• Added the 15th upgrade row The upgrade tree now includes a new 15th row unlocked at 30,000 score.
• Added Ultimate skill unlocks The 15th row unlocks a new 7th active skill slot: Ultimate.
• Added 5 Ultimate variants
• Double clicks
• Absolute protection
• Infinite energy
• Alien Abduction
• Time Stop

Gas Nova reworked Gas Nova now deals explosion damage and applies poison in a larger area.

Active skills now support per-player state This allows co-op players to use their own skills, cooldowns, charges, costs, and upgrades independently.

Balance & Gameplay Changes

• Upgrade row 3 rebalanced Several upgrade skills in row 3 were adjusted and nerfed.
• Mastery difficulty scaling added Enemy HP, damage, spawn pacing, and EXP rewards now scale with Mastery tiers.
• Loot system reworked Loot now uses one shared item system instead of several separate item rules.
• Drop pacing is now more consistent Loot drops now follow a more deterministic cycle, making item rewards feel less random and less streaky.
• Loot item effects updated Loot can now cover more types of run support, including:
• healing
• energy recovery
• cable repair
• cooldown reduction
• temporary bonuses
• stronger run utility effects

Medkit and Glove updated Medkit and Glove are now part of the updated loot system and should fit better into the new item balance.

Final boss leaderboard support added Final boss runs can now save leaderboard scores.

UI/UX Improvements

• Added new game mode selection menu The mode menu now includes Campaign, Co-op, Mastery, and Builds.
• Added Level Info menu You can now view more information before starting selected content.
• HUD updated for multiple players The HUD now supports player cards, separate skill states, separate resources, and hiding controls for non-local players.
• Added new UI icons and menu graphics New visuals were added for Builds, Co-op, Mastery, and multiplayer-related menus.
• Added new visual polish
• Level particles
• Object shadows
• Improved layering consistency

Localization

• Czech language added Czech is now available as a selectable in-game language.

Fixes

• Fixed several run timer issues

What’s next?

More fixes, balance updates, and gameplay improvements are on the way. If you notice anything weird — bugs, balance issues, UX problems, or co-op issues — feel free to share.

Thanks for playing