FM27 — SYSTEM-DRIVEN FOOTBALL
Burak Karaca | 27.0.0

Let’s try the structure I want to see in Turkish football inside Football Manager 27. I have turned the development model from my own article into a single FMF, integrated with Türkiye Alt Ligler v2.

THE IDEA BEHIND THIS PATCH
Sınırlarla Değil, Sistemle Gelişen Futbol: Gerçek Reformun Anahtarı
https://www.burakkaraca.com.tr/yazilar/sinirlarla-degil-sistemle-gelisen-futbol/
In my article of 31 May 2025, I proposed a sustainable structure that gives young players opportunities on the pitch and assigns different roles to each tier, from the Süper Lig to amateur football. This patch is a playable FM27 adaptation of the structure I believe Turkish football should have. It does not represent official TFF regulations.

99 — Registration places
1 FMF — Lower leagues included
1 model — From top tier to grassroots

SÜPER LIG
Starting XI: No youth or domestic-player requirement.
Matchday squad: At least 1 U23.
Player eligibility: No foreign-player limit.

1. LIG
Starting XI: At least 1 U23.
Matchday squad: At least 3 U23 players trained in Turkey.
Player eligibility: Up to 5 foreigners in registration and matchday squads; all must be U23.

2. LIG
Starting XI: At least 1 U21 and 3 U23.
Matchday squad: At least 2 U19 and 6 U25 players trained in Turkey. Up to 11 players aged over 28.
Player eligibility: No foreign players.

3. LIG
Starting XI: At least 1 U19, 3 U21 and 5 U23.
Matchday squad: At least 4 U19 and 6 U25 players trained in Turkey. Up to 11 players aged over 28.
Player eligibility: No foreign players. Players on amateur contracts cannot play.

BAL & AMATEUR LEAGUES
Starting XI: At least 3 U19 and 5 U21.
Matchday squad: At least 5 U19. Up to 8 players aged over 28.
Player eligibility: No foreign players. Players on amateur contracts can play.

Turkish Cup
Every team must start at least 1 U19, 4 U21 and 7 U23 players. The same requirement replaces the previous cup quotas that varied by league.
Turkish Super Cup
No additional age, foreign, domestic or homegrown-player quota.

How the model is implemented
Age groups overlap
An U19 player also counts towards U21 and U23 requirements. The cup’s 1/4/7 rule does not require 12 different young players: 1 U19 + 3 additional U21 + 3 additional U23 is enough.

The U29 target assumes a full 21-player squad
2. Lig and 3. Lig allow up to 11 players aged over 28; BAL and below allow up to 8. In a full 21-player matchday squad, this ensures at least 10 and 13 U29 players respectively. Smaller squads do not guarantee the same youth totals.

U19 is an age requirement
The combined U19 + club-trained condition in my article is not enforced in this version. U19 is based directly on age. The U23 trained-in-Turkey requirement in 1. Lig and the U25 requirements in 2. Lig and 3. Lig are enforced.

One file. A new career.
1. Extract the ZIP and copy Sistemle-Gelisen-Futbol.fmf into your editor data folder.
2. Enable this FMF in a new career’s database/editor-data screen. Türkiye Alt Ligler v2 is included; do not enable it separately.
3. Do not combine it with Global, other Turkish foreign/squad options or separate Turkish lower-league rules files.
4. Select your Turkish leagues. Check league/cup rules and registration screens when the career starts.
Documents\Sports Interactive\Football Manager 27\editor data

99 is the season registration limit, not the matchday squad or substitute count. The game determines age eligibility using its seasonal cutoff dates. The patch cannot be applied to an existing save.
Türkiye Youth Rating 200, Fenerbahçe staff/facility edits and injury patches are not included. This file does not raise youth-production ratings or facilities. Financial values are retained from the source lower-league file.

Idea, article and personal rules model: Burak Karaca. Lower-league base: Türkiye Alt Ligler v2. The in-game adaptation is presented with the implementation differences explained above.

https://www.burakkaraca.com.tr/en/projects/game-patches/fm27-system-driven-football/
https://x.com/burakkaraca
iletisim@burakkaraca.com.tr
