\documentclass[tikz,border=10pt]{standalone}
                        \IfFileExists{newpxtext.sty}{\usepackage{newpxtext,newpxmath}}{}
                        \linespread{1.10}
                        \usetikzlibrary{shapes}
                        \usetikzlibrary{arrows.meta}
                        \usepackage{graphicx}

                        \begin{document}

                        % TikZ code with built-in styling for game trees
% TikZ libraries required for game trees
\usetikzlibrary{shapes}
\usetikzlibrary{arrows.meta}

% Style settings for game tree formatting
\tikzset{
    every node/.append style={font=\sffamily\itshape},
    every text node part/.append style={align=center},
    node distance=1.5mm,
    thick
}

% Built-in macro definitions for game tree drawing
\newdimen\ndiam
\ndiam1.5mm
\newdimen\sqwidth
\sqwidth1.6mm
\newdimen\spx
\spx.7mm
\newdimen\spy
\spy.5mm
\newdimen\paydown
\paydown2.5ex
\newdimen\treethickn
\treethickn1.0pt
\definecolor{chancecolor}{RGB}{117,145,56}
\definecolor{playeronecolor}{RGB}{234,51,35}
\colorlet{playertwocolor}{blue}
\colorlet{playerthreecolor}{orange}
\colorlet{playerfourcolor}{purple}
\colorlet{playerfivecolor}{cyan}
\colorlet{playersixcolor}{magenta}

% Game tree content from /home/docs/checkouts/readthedocs.org/user_builds/gambitproject/checkouts/936/catalog/img/books/shohambrown2008/fig6_8.ef
\begin{tikzpicture}[scale=0.8
  , StealthFill/.tip={Stealth[line width=.7pt,inset=0pt,length=13pt,angle'=30]}]
% \draw [help lines, color=green] (-5,0) grid (5,-6);
\draw [line width=\treethickn,color=playeronecolor] (-12,-1.625) arc(90:270:0.375)
  -- (-4,-2.375) arc(-90:90:0.375) -- cycle;
\draw [line width=\treethickn,color=playertwocolor] (-14,-5.625) arc(90:270:0.375)
  -- (6,-6.375) arc(-90:90:0.375) -- cycle;
\draw [line width=\treethickn,color=playertwocolor] (-6,-7.625) arc(90:270:0.375)
  -- (14,-8.375) arc(-90:90:0.375) -- cycle;
\draw [line width=\treethickn,color=playeronecolor] (4,-3.625) arc(90:270:0.375)
  -- (12,-4.375) arc(-90:90:0.375) -- cycle;
%% player 1 name 1
\def\playerone{1}
%% player 2 name 2
\def\playertwo{2}
%% level -2.0 node 1 player 0
\def\playerzero{Chance}
\draw [line width=\treethickn] (0,2)
   ;
%% level 2.0 node 1 xshift -12.0 from -2.0,1 move MP~(\frac{1}{4})
\draw [line width=\treethickn,color=chancecolor] (-12,-2)
   -- (0,2);
\draw (-6,0) node[left,xshift=-5mm,color=chancecolor] {MP~($\frac{1}{4}$)\strut};
%% level 6.0 node 1 xshift -2.0 from 2.0,1 move U
\draw [line width=\treethickn,color=playeronecolor] (-14,-6)
   -- (-12,-2);
\draw (-13,-4) node[left,xshift=-2.5mm,color=playeronecolor] {U\strut};
%% level 12.0 node 1 xshift -1.0 from 6.0,1 move L payoffs 2 0
\draw [line width=\treethickn,color=playertwocolor] (-15,-12)
   node[below,yshift=0.1\paydown,color=playeronecolor] {$\mathsf{2}\strut$}
   node[below,yshift=-0.9\paydown,color=playertwocolor] {$\mathsf{0}\strut$}
   -- (-14,-6);
\draw (-14.5,-9) node[left,xshift=-2.5mm,color=playertwocolor] {L\strut};
%% level 12.0 node 2 xshift 1.0 from 6.0,1 move R payoffs 0 2
\draw [line width=\treethickn,color=playertwocolor] (-13,-12)
   node[below,yshift=0.1\paydown,color=playeronecolor] {$\mathsf{0}\strut$}
   node[below,yshift=-0.9\paydown,color=playertwocolor] {$\mathsf{2}\strut$}
   -- (-14,-6);
\draw (-13.5,-9) node[right,xshift=2.5mm,color=playertwocolor] {R\strut};
%% level 6.0 node 2 xshift 2.0 from 2.0,1 move D
\draw [line width=\treethickn,color=playeronecolor] (-10,-6)
   -- (-12,-2);
\draw (-11,-4) node[right,xshift=2.5mm,color=playeronecolor] {D\strut};
%% level 12.0 node 3 xshift -1.0 from 6.0,2 move L payoffs 0 2
\draw [line width=\treethickn,color=playertwocolor] (-11,-12)
   node[below,yshift=0.1\paydown,color=playeronecolor] {$\mathsf{0}\strut$}
   node[below,yshift=-0.9\paydown,color=playertwocolor] {$\mathsf{2}\strut$}
   -- (-10,-6);
\draw (-10.5,-9) node[left,xshift=-2.5mm,color=playertwocolor] {L\strut};
%% level 12.0 node 4 xshift 1.0 from 6.0,2 move R payoffs 2 0
\draw [line width=\treethickn,color=playertwocolor] (-9,-12)
   node[below,yshift=0.1\paydown,color=playeronecolor] {$\mathsf{2}\strut$}
   node[below,yshift=-0.9\paydown,color=playertwocolor] {$\mathsf{0}\strut$}
   -- (-10,-6);
\draw (-9.5,-9) node[right,xshift=2.5mm,color=playertwocolor] {R\strut};
%% level 2.0 node 2 xshift -4.0 from -2.0,1 move PD~(\frac{1}{4})
\draw [line width=\treethickn,color=chancecolor] (-4,-2)
   -- (0,2);
\draw (-2,0) node[left,xshift=-5mm,color=chancecolor] {PD~($\frac{1}{4}$)\strut};
%% level 8.0 node 1 xshift -2.0 from 2.0,2 move U
\draw [line width=\treethickn,color=playeronecolor] (-6,-8)
   -- (-4,-2);
\draw (-5,-5) node[left,xshift=-2.5mm,color=playeronecolor] {U\strut};
%% level 12.0 node 5 xshift -1.0 from 8.0,1 move L payoffs 2 2
\draw [line width=\treethickn,color=playertwocolor] (-7,-12)
   node[below,yshift=0.1\paydown,color=playeronecolor] {$\mathsf{2}\strut$}
   node[below,yshift=-0.9\paydown,color=playertwocolor] {$\mathsf{2}\strut$}
   -- (-6,-8);
\draw (-6.5,-10) node[left,xshift=-2.5mm,color=playertwocolor] {L\strut};
%% level 12.0 node 6 xshift 1.0 from 8.0,1 move R payoffs 0 3
\draw [line width=\treethickn,color=playertwocolor] (-5,-12)
   node[below,yshift=0.1\paydown,color=playeronecolor] {$\mathsf{0}\strut$}
   node[below,yshift=-0.9\paydown,color=playertwocolor] {$\mathsf{3}\strut$}
   -- (-6,-8);
\draw (-5.5,-10) node[right,xshift=2.5mm,color=playertwocolor] {R\strut};
%% level 8.0 node 2 xshift 2.0 from 2.0,2 move D
\draw [line width=\treethickn,color=playeronecolor] (-2,-8)
   -- (-4,-2);
\draw (-3,-5) node[right,xshift=2.5mm,color=playeronecolor] {D\strut};
%% level 12.0 node 7 xshift -1.0 from 8.0,2 move L payoffs 3 0
\draw [line width=\treethickn,color=playertwocolor] (-3,-12)
   node[below,yshift=0.1\paydown,color=playeronecolor] {$\mathsf{3}\strut$}
   node[below,yshift=-0.9\paydown,color=playertwocolor] {$\mathsf{0}\strut$}
   -- (-2,-8);
\draw (-2.5,-10) node[left,xshift=-2.5mm,color=playertwocolor] {L\strut};
%% level 12.0 node 8 xshift 1.0 from 8.0,2 move R payoffs 1 1
\draw [line width=\treethickn,color=playertwocolor] (-1,-12)
   node[below,yshift=0.1\paydown,color=playeronecolor] {$\mathsf{1}\strut$}
   node[below,yshift=-0.9\paydown,color=playertwocolor] {$\mathsf{1}\strut$}
   -- (-2,-8);
\draw (-1.5,-10) node[right,xshift=2.5mm,color=playertwocolor] {R\strut};
%% level 4.0 node 1 xshift 4.0 from -2.0,1 move Coord~(\frac{1}{4})
\draw [line width=\treethickn,color=chancecolor] (4,-4)
   -- (0,2);
\draw (2,-1) node[right,xshift=5mm,color=chancecolor] {Coord~($\frac{1}{4}$)\strut};
%% level 6.0 node 3 xshift -2.0 from 4.0,1 move U
\draw [line width=\treethickn,color=playeronecolor] (2,-6)
   -- (4,-4);
\draw (3,-5) node[left,xshift=-2.5mm,color=playeronecolor] {U\strut};
%% level 12.0 node 9 xshift -1.0 from 6.0,3 move L payoffs 2 2
\draw [line width=\treethickn,color=playertwocolor] (1,-12)
   node[below,yshift=0.1\paydown,color=playeronecolor] {$\mathsf{2}\strut$}
   node[below,yshift=-0.9\paydown,color=playertwocolor] {$\mathsf{2}\strut$}
   -- (2,-6);
\draw (1.5,-9) node[left,xshift=-2.5mm,color=playertwocolor] {L\strut};
%% level 12.0 node 10 xshift 1.0 from 6.0,3 move R payoffs 0 0
\draw [line width=\treethickn,color=playertwocolor] (3,-12)
   node[below,yshift=0.1\paydown,color=playeronecolor] {$\mathsf{0}\strut$}
   node[below,yshift=-0.9\paydown,color=playertwocolor] {$\mathsf{0}\strut$}
   -- (2,-6);
\draw (2.5,-9) node[right,xshift=2.5mm,color=playertwocolor] {R\strut};
%% level 6.0 node 4 xshift 2.0 from 4.0,1 move D
\draw [line width=\treethickn,color=playeronecolor] (6,-6)
   -- (4,-4);
\draw (5,-5) node[right,xshift=2.5mm,color=playeronecolor] {D\strut};
%% level 12.0 node 11 xshift -1.0 from 6.0,4 move L payoffs 0 0
\draw [line width=\treethickn,color=playertwocolor] (5,-12)
   node[below,yshift=0.1\paydown,color=playeronecolor] {$\mathsf{0}\strut$}
   node[below,yshift=-0.9\paydown,color=playertwocolor] {$\mathsf{0}\strut$}
   -- (6,-6);
\draw (5.5,-9) node[left,xshift=-2.5mm,color=playertwocolor] {L\strut};
%% level 12.0 node 12 xshift 1.0 from 6.0,4 move R payoffs 1 1
\draw [line width=\treethickn,color=playertwocolor] (7,-12)
   node[below,yshift=0.1\paydown,color=playeronecolor] {$\mathsf{1}\strut$}
   node[below,yshift=-0.9\paydown,color=playertwocolor] {$\mathsf{1}\strut$}
   -- (6,-6);
\draw (6.5,-9) node[right,xshift=2.5mm,color=playertwocolor] {R\strut};
%% level 4.0 node 2 xshift 12.0 from -2.0,1 move BoS~(\frac{1}{4})
\draw [line width=\treethickn,color=chancecolor] (12,-4)
   -- (0,2);
\draw (6,-1) node[right,xshift=5mm,color=chancecolor] {BoS~($\frac{1}{4}$)\strut};
%% level 8.0 node 3 xshift -2.0 from 4.0,2 move U
\draw [line width=\treethickn,color=playeronecolor] (10,-8)
   -- (12,-4);
\draw (11,-6) node[left,xshift=-2.5mm,color=playeronecolor] {U\strut};
%% level 12.0 node 13 xshift -1.0 from 8.0,3 move L payoffs 2 1
\draw [line width=\treethickn,color=playertwocolor] (9,-12)
   node[below,yshift=0.1\paydown,color=playeronecolor] {$\mathsf{2}\strut$}
   node[below,yshift=-0.9\paydown,color=playertwocolor] {$\mathsf{1}\strut$}
   -- (10,-8);
\draw (9.5,-10) node[left,xshift=-2.5mm,color=playertwocolor] {L\strut};
%% level 12.0 node 14 xshift 1.0 from 8.0,3 move R payoffs 0 0
\draw [line width=\treethickn,color=playertwocolor] (11,-12)
   node[below,yshift=0.1\paydown,color=playeronecolor] {$\mathsf{0}\strut$}
   node[below,yshift=-0.9\paydown,color=playertwocolor] {$\mathsf{0}\strut$}
   -- (10,-8);
\draw (10.5,-10) node[right,xshift=2.5mm,color=playertwocolor] {R\strut};
%% level 8.0 node 4 xshift 2.0 from 4.0,2 move D
\draw [line width=\treethickn,color=playeronecolor] (14,-8)
   -- (12,-4);
\draw (13,-6) node[right,xshift=2.5mm,color=playeronecolor] {D\strut};
%% level 12.0 node 15 xshift -1.0 from 8.0,4 move L payoffs 0 0
\draw [line width=\treethickn,color=playertwocolor] (13,-12)
   node[below,yshift=0.1\paydown,color=playeronecolor] {$\mathsf{0}\strut$}
   node[below,yshift=-0.9\paydown,color=playertwocolor] {$\mathsf{0}\strut$}
   -- (14,-8);
\draw (13.5,-10) node[left,xshift=-2.5mm,color=playertwocolor] {L\strut};
%% level 12.0 node 16 xshift 1.0 from 8.0,4 move R payoffs 1 2
\draw [line width=\treethickn,color=playertwocolor] (15,-12)
   node[below,yshift=0.1\paydown,color=playeronecolor] {$\mathsf{1}\strut$}
   node[below,yshift=-0.9\paydown,color=playertwocolor] {$\mathsf{2}\strut$}
   -- (14,-8);
\draw (14.5,-10) node[right,xshift=2.5mm,color=playertwocolor] {R\strut};
%% iset 2.0,1 2.0,2 player 1
%% iset 6.0,1 6.0,2 6.0,3 6.0,4 player 2
%% iset 8.0,1 8.0,2 8.0,3 8.0,4 player 2
%% iset 4.0,1 4.0,2 player 1
\node[inner sep=0pt,minimum size=\sqwidth,draw=chancecolor,fill=chancecolor,shape=rectangle] at (0,2) {};
\node[inner sep=0pt,minimum size=\ndiam,draw=playeronecolor,fill=playeronecolor,shape=circle] at (-12,-2) {};
\node[inner sep=0pt,minimum size=\ndiam,draw=playertwocolor,fill=playertwocolor,shape=circle] at (-14,-6) {};
\node[inner sep=0pt,minimum size=\ndiam,draw=playertwocolor,fill=playertwocolor,shape=circle] at (-10,-6) {};
\node[inner sep=0pt,minimum size=\ndiam,draw=playeronecolor,fill=playeronecolor,shape=circle] at (-4,-2) {};
\node[inner sep=0pt,minimum size=\ndiam,draw=playertwocolor,fill=playertwocolor,shape=circle] at (-6,-8) {};
\node[inner sep=0pt,minimum size=\ndiam,draw=playertwocolor,fill=playertwocolor,shape=circle] at (-2,-8) {};
\node[inner sep=0pt,minimum size=\ndiam,draw=playeronecolor,fill=playeronecolor,shape=circle] at (4,-4) {};
\node[inner sep=0pt,minimum size=\ndiam,draw=playertwocolor,fill=playertwocolor,shape=circle] at (2,-6) {};
\node[inner sep=0pt,minimum size=\ndiam,draw=playertwocolor,fill=playertwocolor,shape=circle] at (6,-6) {};
\node[inner sep=0pt,minimum size=\ndiam,draw=playeronecolor,fill=playeronecolor,shape=circle] at (12,-4) {};
\node[inner sep=0pt,minimum size=\ndiam,draw=playertwocolor,fill=playertwocolor,shape=circle] at (10,-8) {};
\node[inner sep=0pt,minimum size=\ndiam,draw=playertwocolor,fill=playertwocolor,shape=circle] at (14,-8) {};

% Player color legend
\begin{scope}[scale=1,shift={(-16.5,2.0)}]
\node[inner sep=0pt,minimum size=\sqwidth,draw=chancecolor,fill=chancecolor,shape=rectangle] at (0,0) {};
\node[anchor=west] at (0.3,0) {Chance};
\node[inner sep=0pt,minimum size=\ndiam,draw=playeronecolor,fill=playeronecolor,shape=circle] at (0,-0.625) {};
\node[anchor=west] at (0.3,-0.625) {1};
\node[inner sep=0pt,minimum size=\ndiam,draw=playertwocolor,fill=playertwocolor,shape=circle] at (0,-1.25) {};
\node[anchor=west] at (0.3,-1.25) {2};
\end{scope}

\end{tikzpicture}

                        \end{document}