Create a Roblox tower defense with AI
A tower defense is played with the head: the player places, upgrades, reacts. The whole genre lives in one tension — every wave must be winnable by good placement and lost by bad placement, never decided by chance.
What makes a good tower defense
The path is the puzzle
Bends, chokepoints and long straights are where decisions happen. A straight path has one solution; a good path has several.
Waves teach, then test
A new enemy type appears alone first, then mixed with the previous ones. The player learns what beats it before being overwhelmed.
Economy rewards commitment
Money earned per kill, spent between waves. Upgrading an existing tower must sometimes be better than placing a new one, or the game has no depth.
The systems to write
- Waves — A schedule of enemy groups with growing difficulty and boss waves.
- Towers — Placement rules, targeting, upgrade tiers, all resolved on the server.
- Enemies and path — Server-driven movement along waypoints, health and rewards.
- Round economy — Income per kill and per wave, costs per tower and per upgrade.
Common pitfalls
Enemies are moved by the client.
Enemy position is server state. The client only renders it; otherwise waves desync between players.
Every tower scans every enemy every frame.
Targeting on a timer at a few hertz, with a spatial shortcut. A frame loop over all pairs is what makes late waves stutter.
What Nemesis builds for a tower defense
Nemesis builds the map with a path made of readable bends and chokepoints, writes server-side waves, towers and economy with all numbers in one balancing module, then plays several waves in a real playtest to verify that enemies follow the path, towers fire and money flows without errors.
Visual direction enforced by the quality check: balanced exposure and contrast, nothing washed out.
Frequently asked
Solo or cooperative?
Cooperative tower defense is the most played form on Roblox. Shared money or separate money is a design decision to take before building the economy.
How many towers for a first version?
Four or five with two or three upgrade tiers each. Enough for real choices, few enough to balance against ten waves.