Wave Pressure Lab — Offline Wave & Concurrency Planner

Find the pressure spike before you build the wave.

Wave Pressure Lab is an offline planning tool for tower-defense and survivor-game developers. Enter threat weights, expected lifetimes and timed spawn groups to see when enemies overlap.

What you can do

• See simultaneous enemy count and weighted-threat timelines
• Find intervals above your chosen threat capacity
• Compare 75%, 100% and 125% lifetime scenarios
• Pin a baseline for comparison
• Save/open project JSON; export timeline, group and individual spawn CSVs, plus full analysis JSON
• Use the English or Korean interface and guide

Free browser version / $4 offline package

The free browser version offers the same calculations. The downloadable package provides a convenient local copy, readable source, tests, three examples and a bilingual guide. Extract the ZIP and open index.html. No installation, account, API keys or external libraries are needed.

Model and limits

This is a planning estimate. Enemies remain for the expected lifetime you enter. Damage, targeting, pathfinding and player skill are not simulated. Threat and capacity are your assumptions. You implement any engine integration yourself.

Up to 40 enemy types, 120 groups and 20,000 spawns, with a 24-hour timeline and microsecond time rounding. The downloaded app has no network requests or telemetry. The hosted demo is subject to itch.io policies. Modern desktop Chrome tested; other browsers are unverified.

한국어 안내

적 출현이 겹칠 때의 동시 생존 수와 가중 위협도를 계산합니다. 허용치 초과 구간, 생존시간 가정 비교, 기준선 비교, JSON/CSV 내보내기를 지원합니다. 실제 전투 밸런스를 예측하는 도구는 아닙니다. 브라우저에서 무료로 계산을 사용하고, $4 패키지로 로컬 실행본·소스·테스트·예제·한국어 설명서를 받을 수 있습니다.

License and disclosure

Commercial project use and modification allowed under the included license; standalone resale or repackaging prohibited. AI-assisted code, text and programmatic cover design. No promise of future updates or engine integration.