Radiation functions as a pure point scale, since such items actively reduces radiation gain by direct subtraction some armors will instead do a percentage, but if you manage to get several items that can reduce radiation gain to zero or less, you never get irradiated no matter how long you stay in the hot zone. It should be noted that resistances are sometimes given in points and sometimes as a percentage. There are several types of damage in the STALKER game, chiefly bullet damage, but also impact (falling), bleeding, chemical burn, electric shock, radiation. Positive benefits (green) Positive benefits usually mean the reduction of injury from - or increased resistance against - a certain class of damage. Do you best to keep rare artifacts so you can gloat over owning them. Rare artifacts are those earned as rewards from side jobs (not all side jobs award you with rares) and the very occasional random spawn (the rare Spring for example, simalcrum found in the bloodsucker village silo). Common and uncommon artifacts are "anomalous" artifacts since they are created from anomalies and usually are found near them. Artifacts can be classified as "common", "uncommon" and "rare". Could be a one time thing, but the following is a list of artifacts from the game, with their anomalous origin, and a personal brief of their abilities (note you can set up a fake multiplayer artifact hunt with bots and check the items).
Anomalies that occur in large groupings seem to create artifacts easier (unproven) since all the times simalcrum saw artifacts "spawn" on a map, the anomaly detector was constantly pinging. You can speed up in-game time using the NUMPAD / and NUMPAD * keys, so if you can actually verify this is true, you can load up on food and grab artifacts near anomalies. Later on, you may find artifacts respawning (rarely) near anomalies after you pass a lot of in-game time (this is a very rare occurence that borders on a possible bug).
When you first approach an anomaly, there are sometimes artifacts that are already produced and floating on the ground (esp.