app/views/attempts/modes/_co-op.html.erb
<div class="span1 score-color">
<h4><span id="puzzle_score"><%= @attempt.team_score %></span> / <%= @puzzle.pieces.count %></h4> team score
</div>
<div class="span3" id="player-list">
<h5>Players</h5>
<% @attempt.users.uniq.each do |user| %>
<p><%=user%></p>
<% end %>
</div>