Attention I.S.S.A. Field Agents:

Game Handbook (5.5 MB pdf)
Operatives, the time is near! This file contains all the information you'll need to prepare for the impending alien invasion. Read it, then destroy it; we can't afford this information falling into the wrong hands.

ETI Notebook: Issue One (300 kB)
'A House Rule for Scooping'

ETI Notebook: Issue Two (340 kB)
''Reduced 'Spread' Endgame Variant'