Stalker style Anomalies. Plus the various detectors that could be required to detect those anomalies to avoid anomalous areas. Traversing them etc…
Being able to make those detectors would require certain levels of skill. Plus the programs that can be found in lab computers maybe downloaded to memory devices and transferred accordingly to other devices of storage.
Dead scientists can carry better detectors and the best ones of course. Better than what can be home made. Look to:
ModDB and Stalker Anomaly for easy information on this as a guide. Also. Play that game too =P