Invasion... Level 1: Contamination

Invasion... Level 1: Contamination is a single-level PWAD for Doom that was released in 1994. It was designed by Andy Chen and Claude Martins. It was followed by Invasion… Level 2: The Upper Decks.

Secrets

 * 1) (sector 27)
 * 2) (sector 28)
 * 3) (sector 118)
 * 4) (sector 122)
 * 5) (sector 179)
 * 6) (sector 256)
 * 7) (sector 285)

Current records
The records for the map at the Doomed Speed Demos Archive are:

Things
This level contains the following numbers of things per skill level: