t = game.thing_types['Player'](game)
t.position = YX(game.map.size.y // 2, game.map.size.x // 2)
game.things += [t] # TODO refactor into Thing.__init__?
+ t.player_char = game.get_next_player_char()
game.sessions[connection_id] = t.id_
game.io.send('LOGIN_OK', connection_id)
t.nickname = nick