UE5 MOBA

Overview#

Team	Duration	Stack
Solo	Jul 2026 ~	UE5, C++, Gameplay Ability System

A MOBA combat prototype built on Unreal Engine 5's Gameplay Ability System (GAS), covering skillshots, a non-targeted ultimate, leveling, an item shop, and lane minions.

Combat System#

• Four distinct ability types built on GAS: basic attacks, montage-section-driven combos, a line skillshot, and a non-targeted AoE ultimate
• The combo chains into different montage sections and GameplayEffects depending on input timing, mapping each combo stage to its own damage table
• The non-targeted ultimate (Blackhole) runs a 4-stage casting sequence: an aiming montage → placement confirmed via AbilityTask_WaitTargetData → a pull-aura active for its duration → an area-of-effect finishing blow on end
• The skillshot's dedicated TargetActor reads the caster's GenericTeamId to automatically ignore its own team
• The camera is an over-the-shoulder action camera rather than a top-down MOBA view — aiming interpolates a separate spring-arm offset on entering/exiting aim mode

Stats & Progression#

• A GAS AttributeSet manages Health, Mana, Damage, Armor, Speed, Strength, and Intelligence as fully replicated attributes
• Strength and Intelligence each carry a separate GrowthRate, so stats scale automatically on level-up — the classic MOBA growth curve
• ModifierMagnitudeCalculation splits "based on base attack" vs. "based on level" damage formulas out of ability code, so balance changes only require swapping the calculation, not touching abilities
• Base stats and the per-level experience curve live in data tables / curve tables, so numbers can be tuned without recompiling

Item Shop & Inventory#

• A gold-based shop UI backed by an inventory component that applies gameplay effects to the ability system the moment a purchase completes
• Purchases go through a Server RPC with WithValidation, so the server has final say and client-side manipulation can't force an illegitimate purchase

Lane Minions & AI#

• A Barrack actor spawns minions per team on a timer, using object pooling and cycling through multiple spawn points to keep spawn cost bounded
• Minions perceive enemies autonomously via Behavior Tree + AI Perception (sight), writing detected targets to the blackboard and driving ability use from there
• Team affiliation (GenericTeamId) distinguishes friend from foe, and the same team data is reused for skillshot target filtering

UI/HUD#

• Hand-built MOBA-style HUD widgets: ability cooldown gauges, a level gauge, an overhead health bar, a crosshair, and stat gauges

Current Status#

Still a prototype — actively working through:

• Minion avoidance behavior not yet implemented
• Combo feel needs work
• Ragdoll response needs improvement
• Minions following the player too aggressively
• Texture flicker, likely a streaming/LOD issue