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Created page with "{{Infobox mod |title = Columbine Highschool |logo = https://i.imgur.com/htA3elKm.jpg |developer = [https://steamcommunity.com/id/withextrafoam a social guarantee] |version = 1.0 |release = 2017-11-04 }} ==Description== Sandbox/wave survival map. Press your use key on NPCs to yell threats. Break a window or attack an NPC to initiate the waves. Waves consist of Combine units that increase in power as time goes on. Includes custom music & sound effects. Extract to your G..."