Breaches

What to do in the event of a Containment Breach from a Euclid/Keter-Class Anomaly:

There are numerous Euclid and Keter-Class anomalies housed at Site-## that you will not work with but that may still break containment.
It is important in these instances to remain calm and, if you see an anomaly and the alarm is not raised, to raise it, whilst being careful not to succumb to the anomaly yourself.
For example, SCP-096 and SCP-173: Do NOT look at SCP-096, and DO look at SCP-173. You will find more information on these anomalies at a later date.

SCP-096 with its face covered as to not trigger its effect.
SCP-096, with its face obscured to protect you from its anomalous effect.[1][1a]
An image of SCP-173
SCP-173. Ensure you stare at it if it is not in its containment cell.[2]

What to do in the event of a Containment Breach by an outside organisation:

There are outside organisations and entities that wish to obtain information, free/capture contained SCPs, or generally destroy the Foundation itself.
The Chaos Insurgency, the Children of the Scarlet King, The Occult Coalition - just to name a few. If you notice anyone within the Foundation uttering strange chants, talking in unrecognised code, or indiscriminately shouting "CHAOS", report them immediately.
Depending on the situation, it may be necessary to invoke Alpha Protocol, but this will be covered at a later date.

A Chaos Insurgency soldier.
A Chaos Insurgent footsoldier[3]
Image of the Alpha Warhead in Heavy Containment.
The Alpha Warhead[4]