[Exolent[jNr]]

#include < amxmodx >

#define WIN_PERCENT 50

public plugin_init( )
{
    register_plugin( "Gamble Mod", "0.0.1", "Exolent" );
    
    register_clcmd( "say /gamble"     , "CmdGamble" );
    register_clcmd( "say_team /gamble", "CmdGamble" );
}

public CmdGamble( iPlayer )
{
    if( random_num( 1, 100 ) <= WIN_PERCENT )
    {
        client_print( iPlayer, print_chat, "* You won!" );
    }
    else
    {
        client_print( iPlayer, print_chat, "* You lost!" );
    }
}