Whistle1 is a retro football manager in the style of the 1990s classics. Take over a club, sign players, run training, set tactics, manage finances and the stadium, and lead your team through league play, a national cup competition with amateur rounds, and European cup competitions. FIFTEEN COUNTRIES, ONE MANAGER Play in Germany, England, Turkey, Italy, France, Spain, Brazil, Argentina, the Netherlands, Portugal, Belgium, Austria, Switzerland, Denmark or Poland. Each country has three league divisions, a national cup with amateur rounds, country-specific referee names and localised stadium names – and the league format it really plays, split leagues and two champions a year included. The game ships with 45 league competitions and over 1,700 clubs. If that is not enough, build a country of your own from 37 templates. 48 LANGUAGES The entire interface, plus match commentary in the supported languages, has been translated into 48 languages including German, English, Turkish, Arabic and 44 more. A YOUTH ACADEMY OF YOUR OWN Three age groups (U15, U17, U19) with their own youth league, their own table and their own scorer list. The academy has five levels, and they decide the number of places, the training budget, individual training and trial weeks. Training goes by position, and match practice counts towards it. The first pro contract from 16 promotes the player into the squad and protects him from being poached at the same time. Talent is found through a scout in three ranges or on the board of players other clubs release. MANAGEMENT WITHOUT HAND-HOLDING Player transfers and contract negotiations. A market value system. Nine training areas. A stadium editor with multiple expansion levels and tribune sections, plus the option to convert standing terraces to seating. Finances and sponsoring with a bonus filter that hides unrealistic offers. Press conferences and interviews. LIVE MATCH SIMULATION Live text-based match events with real-time commentary at five intensity levels. Set the lineup and tactics, watch the match unfold, react. TEN-SEASON CAREER A multi-season career mode with a form system on a scale of 0 to 20, team morale on a scale of 0 to 8, and a manager reputation that follows you across clubs. Long-term goal: become national team coach. ACHIEVEMENTS AND ADVANCED SEARCH 80 achievements across seven categories, tracked across your entire career. An advanced player search filters by position, age, market value, league and country. FREE, WITHOUT TRADE-OFFS Whistle1 is free to play, with no subscription and no pay-to-win. You can reach the career goal without paying. Ads exist only in the Android version (Google Play), where a purchase removes them; there are no ads on Steam, itch.io or the App Store. Optional purchases are the database editor, a custom player, an unlimited career and boosts. Core gameplay runs offline. A global online leaderboard (top 100) lets you compare careers worldwide. Community-created databases can be imported as user files. PLAY IT ANYWHERE Google Play, App Store (iOS 17 or later), Steam (Windows, Linux), itch.io and directly in the browser. Current version: 2.2.1 (September 2026). RETRO WORLD TOURNAMENT EDITION A separate tournament edition for the big tournament is shortly before release, with no date fixed yet. Pre-registration on Google Play includes the database editor as a gift. DEVELOPED BY ONE PERSON, WITH AI AS A TOOL Whistle1 is made in Rudolstadt, Thuringia, as a one-person studio (Digitale Manufaktur Rudolstadt) by Aydin Kaplan, alongside his full-time job. Around 80 percent of the codebase has been written using the AI coding assistant Claude Code, with all design, balancing and product decisions made by the developer.