Sentinel

Sentinel is a stock AI robot, RED ZONE's heavyweight. Possibly the weakest of the heavyweights.

It is a flipper (a bracket wedge on a DDT), and features titanium armor and 4WD Slipperbottoms on powered steering units, giving it a large turning circle and high ground clearance- two very bad things to have in RA2.

Strangely, it is often seen pushing the arena wall and not driving towards its enemy, perhaps bad AIing.

The DSL version of Sentinel is also a flipper called Second Sentinel.

Second Sentinel has nearly no means to do damage (apart from the ramplate), but has a very good wedge and a very powerful flipper (the best of all the DSL AI HW's) that tosses heavyweights clean into the air, often OOTA with ease.

Also see Second Sentinel (NAR AI)