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It's a Party!

Manage to amass thirty ghosts on-screen!

It's a Party!+0.3
1 guideOffline Game Mode - These achievements require play in game modes that do not necessitate a connection to any online services.Single Player - These achievements can be obtained by a single player.Cooperative - These achievements can be obtained by two or more players in a cooperative game mode who have met the achievement requirements.
EastXEastX450,687
05 Oct 2015 05 Oct 2015
0 0 0
This Achievement is easy to get on the final campaign level, the Altar. To unlock the Alter, simply unlock all five sub-rooms of each room by reaching both the required kill counts of the sub-rooms and the overall rooms themselves.

In the Alter level, enemies spawn in continuously as long as the final boss lives. Just avoid the final boss and don't fire any shots. This prevents the regular enemies from firing, so they usually won't be able to hurt you (I did get crushed against a wall once). Only the boss will be able to kill you, so avoid him by double jumping and moving around the room.

Once 30 ghosts have spawned, the Achievement will pop and you can start killing enemies if you like.