GASify (FREE) - A Gameplay Ability System for Unity

Full version: https://assetstore.unity.com/packages/slug/255377

What is it?

A Gameplay Ability System (GAS) is a framework/toolkit to create any game mechanic.

A GAS is like a collection of gears to build any kind of ability. It uses Attributes, Tags, Effects and Modifiers to model any imaginable interaction.

You can build MMO/Action RPG abilities, crazy roguelike upgrades/effects, soulslike poise/stamina/dodge/animation synced systems and immersive sim objects and elemental interactions.

GASify is inspired by Unreal's Gameplay Ability System.

FREE VERSION INCLUDES:

Abilities, Effects, GameplayCues, GameplayTags, Attributes.
Networking/Multiplayer Integration using Mirror.
3 types of Abilities: Instant, Projectile, TargetedProjectile. (Full version: Instant, Projectile, TargetedProjectile, Toggle, Passive, Trigger)
Input buffering

FREE VERSION LIMITATIONS:

Duration and Infinite GEs have a fixed duration.
No Calculations (Can't add custom code/attribute formulas to GameplayEffects)
Only Add/Subtract Attributes Operator (Fullversion: Multiply and Override)
Only Basic Modifier (constant Value) (Fullversion: Basic, ScalableModifier, AttributeBasedModifier CSVModifier)
No Tag filters. (Full version: filter ability and effect activation/removal using tags).

Documentation: https://feliperoddd.gitbook.io/gasify

Overview:

Ability System Component: Main component to put on any entity. Holds the entity's attributes, abilities that can be used, and Gameplay Effects/Tags currently applied to it.
Attributes: Numeric values e.g. Health, Mana, MaxHealth, MaxMana, MovementSpeed, AttackDamage, CriticalChance, Armor.
Modifiers: Change the value of attributes (Add, Multiply, Override). Modifiers come in 4 flavors: Simple (a constant value), Scalable (Scales it's output by a function e.g. Curve), AttributeBased (Uses another attribute to compute the modifier output)
Gameplay Tags: Can be used to categorize effects/abilities or define states. e.g. Element.Fire, Stats.Buff.Stun or State.Movement.Sprinting
Gameplay Effect: Apply a set of modifiers and Calculations to an AbilitySystemComponent (asc). These effects can have different durations: Instant, Duration, Infinite and Periodic.
Calculations: Adds the capability to create any custom behavior/effect. Needs custom code. Executed with the GameplayEffect that has it attached.
Gameplay Ability: Abilities with cost, cooldown, activation/blockage tags. Included: Instant, Passive, Toggle and many more! Melee and projectile ability example included. Any other custom, non general ability can be created by extending this class.
Gameplay Cues: Play sounds, particle effects, animations by just adding a tag to the effect/ability and the prefab on CueLibrary.

Examples:

A spell ability that lasts 10s and heals your target every 2s for 20% of your total Mana.
A passive that increases your CriticalChance by 5% of your MaxHealth but reduces your Armor by 30% your CriticalChance.
A buff that increases your AttackSpeed by 10% of your missing Health for 5s every time you receive damage.
A fireball spell that sets objects on fire, causes instant 120% of your MaxDamage as fire damage and 50% your MinDamage as burning damage over 60s.
A water spell that stops any fire effect and converts any remaining damage over time into healing.
A projectile ability that disables any Healing effect on a given target, reduces his Armor by 10% of your total Mana, and makes anyone in a 10m radius get poisoned for 50s.
A mind control spell that allows a player to take control of another character
You can combine and stack effects, attributes and tags to create any crazy mechanic!
Abilities can also represent a wide array of ingame actions, and are not limited to powers or spells that players explicitly use. Hit reactions, object interaction, animations, vfx/sfx cues are also easily handled.

Features:

Networking/Multiplayer.

Mirror integration with ability Prediction and Replication!

Input Buffering

Buffers any ability that cannot activate immediately and keep retrying to activate it for a brief moment.

Very performant.

Nothing runs on Update().
Handles up to 200k ability activations per second.

Easy workflow.

Setup abilities/effects via code or editor.

Full source code.

Modify anything to your taste.

Mirror Integration (Networking/Multiplayer)

The networking integration is available on the free version. More info on the docs.

Intro

Videos:

1 - GASify - Overview: https://youtu.be/KIY3AKMyYJw
2 - GASify - Modifiers: https://youtu.be/IXT7QvNHd6M
3 - GASify - Calculations: https://youtu.be/zESfPcwKg_M
4 - GASify - Cues: https://youtu.be/GZgtZTv6mN4
5 - GASify - More Abilities Examples: https://youtu.be/2WOSwancZ1g
6 - GASify - Editor Workflow: https://youtu.be/3p-tZk3KEiY
7 - GASify - Bonus Detailed Diagram conversation: https://youtu.be/Wzqz0fnju8o

felipeggrod/gasify