\documentclass[a4paper]{scrartcl}
\usepackage[english]{babel}
\usepackage{microtype}

\input{headers/tikz}
\input{headers/math}
\input{headers/messages}

\title{Tacticians Online}
\subtitle{Design Document}

\begin{document}
\maketitle

\input{src/game_design}
\input{src/implementation}

\end{document}