User blog comment:The Milkman/Multiplayer Ideas/@comment-3226495-20120501163549

New Multiplayer Objective idea: Enemy Stronghold.

For one wave all enemies spawn in only one spot and on that spot is a Harvester for Reapers, Colossus for Geth and something (open for suggestions) for Cerberus. When that super-enemy dies, the enemy stops spawning and when the remaining ones are dead the wave ends. This would be a timed objective.