Praetorian

[spoiler]

Mass Effect 2
Praetorian is a slow moving flying Collector enemy. You will meet this enemy twice over the course of the game. Regardless of your gameplay difficulty setting, those would be hard fights you will remember.

A Praetorian has a high value barrier as well as a lot of armor as its health. It also has two different kinds of deadly attack:
 * 1) laser - when it is hovering, it would fire its laser towards player. The laser lasts about 4 seconds. This is easily dodgeable or taking minimum damage by sprinting from box to box hiding.
 * 2) strike ground (1st phrase), followed by area effect attack (2nd phrase) - If hit, the first phrase of attack would definitely knock out your shield and produce a knock back effect (thus about a 1 sec second); then you would have 0.5 sec to run away from the 2nd phrase. If hit by the 2nd attack, you would most likely die (hardcore level, lv 30 infiltrator died in 1 hit). Most important fact about this attack is that the Praetorian appears to be invulnerable during this attack, AND its barrier recharge to full after the 2nd phrase of attack.

Horizon
At the end of this mission, you would reach an open space with the radio tower. After activating the tower, waves of Collectors and Husk would spawn and attack you. A Praetorian will spawn at the end of the waves.