Invasion of the Abyss

One Game, Two Ways to Face the Abyss
Invasion of the Abyss is a colorful low-poly single-player game with two distinct modes that can be played independently.
- Invasion of the Abyss is an action-survival mode built around hero combat, real-time progression, and descending through consecutive floors.
- Abyss Survival is a tower-defense survival mode focused on construction, resource planning, and holding a limited territory.
Enter the enemy tide and rely on movement, combat, and build choices to keep descending—or remain at the last sanctuary and turn limited space into a defense capable of resisting the abyss.
Invasion of the Abyss: Fight Deeper into the Enemy Tide
Choose from a varied hero roster and enter an abyss structured around floors and waves. Move, attack, and use your abilities while searching for safe ground among increasingly dense enemy groups. Turn every level-up into a new part of your combat build.
Choose skills as you level and spend gold to reroll your options. Between waves, visit the equipment shop to buy, refresh, or lock items. Skills, equipment, and combat modifiers support different damage, survival, and control-focused builds—even when playing the same hero.
New enemy groups, elite enemies, mini-bosses, and invasion events increase the pressure as you descend. Bosses change phases and attack patterns during battle. Clear the floor, enter the abyss portal, and carry your completed build deeper.
Abyss Survival: Turn Your Territory into a Last Defense
Spend energy to construct and upgrade ten building types on a fixed territory with limited space. Offensive towers, control structures, walls, resource production, and repair support form the core of your defense. Placement, coverage, resource timing, and upgrade order all affect whether the sanctuary survives.
At maximum level, buildings can ascend into specialized branches. Every ascension combines a positive and a negative modifier: greater power creates a new cost, and you must decide whether the rest of the defense can carry it.
Survive Day, Night, and a Four-Chapter Campaign
Abyss Survival contains four chapters and twenty escalating waves. Days provide time to prepare and adjust; nights bring heavier assaults. Every fifth wave introduces a block-compression event that damages territory through special rules, followed immediately by a chapter boss.
Ordinary enemies, elite variants, and four multi-stage chapter bosses attack from different directions. Charges, summons, area attacks, ground warnings, and battlefield disruption force you to keep adapting a defense that once felt stable.
Build Around Changing Rules
Six disasters, six weather states, twenty strange rules, and ten block effects can alter combat, targeting, movement, construction, resource flow, and survival conditions. Warnings provide limited time to react, but combined mechanics can turn one weak point into a collapsing defense.
Combine active and passive skills, weapons, armor, enchantments, consumables, possession cards, and transformations. Rescue and recruit NPCs, discover pets, and expand your territory. Persistent progression, missions, achievements, and the bestiary record your journey and open more choices for future runs.
Decide What the Abyss Leaves Behind
Your actions, build, and corruption shape the final route. Complete the four-chapter campaign to reach one of four endings, then review the choices, unlocks, and consequences of your run.
Key Features
- Two independent single-player modes: Invasion of the Abyss and Abyss Survival
- Hero selection, real-time combat, skill upgrades, an equipment shop, and consecutive floor progression
- Ten upgradable building types with branching ascensions that combine benefits and drawbacks
- Four chapters, twenty waves, and four multi-stage chapter bosses
- Dynamic day and night, weather, disasters, strange rules, and block events
- Skills, equipment, consumables, pets, NPC rescues, and territory expansion
- Persistent progression, missions, achievements, bestiary entries, and four endings
- Keyboard, mouse, and controller support with configurable accessibility options