Gridfall

FPS / tower defence / horde survival — Unreal Engine 5, PC, single-player

Concept

A hybrid FPS and tower defence game set in a collapsing city. The player defends the last functioning power station from zombie waves — fighting directly in first person while placing powered defences.. The goal is to keep players switching between action and strategy, never relying on one alone.

Core Pillars

• Fight in first person — shooting, reloading, sprinting stays tense and active
• Build under pressure — place walls/turrets on a grid mid-wave
• Protect infrastructure — the power station is the objective, not just survival
• Manage limited power — power cost prevents unlimited building
• Adapt each wave — escalating pressure forces rebuilding and repositioning

Setting & Tone

A survivor defends their colony's last power station in a ruined, collapsed city. Zombies are drawn to its noise and energy. Tone is dark, gritty, and industrial — urgency and fragility over heroism.

Core Loop

Build defences → spend power → fight the wave → zombies damage player/station/defences → collect drops → repair/rebuild → earn power → next wave.

• Lose if: the power station is destroyed, or the player dies
• Currently: survive as long as possible
• Planned: clearer win condition (restore power, evacuate after N waves)

Playtest Survey Link

http://GridFall.dev.com/PlayerTest-Survey-Form

GitHub Link

https://github.com/Grid-Fall

Key Mechanics

System	Notes
Movement / Shooting / Reload / Sprint	WASD: Move LMB: Shoot RMB: Aim LShift: Sprint R: Reload Space: Jump C: Crouch -Cant sprint while reloading
Build mode (TAB)	Left-click to place, mouse wheel to zoom
Defences	Wall (blocks, high HP), Turret (auto-damage, low HP), Microwave Turret (slows, doesn't attack)
Power station	Main objective; zombies target it when unblocked
Resources	Power (building), Ammo (weapon), Health (survival)