Lookout in a sentence as a noun

Was there some additional circumstance involved here, some other pitfall people should be on the lookout for?

Doom was not some simple little game, it introduced the concept of circle strafing and multi-level enemies in FPS.>The jittery feeling of older games, where every shot counts and you always have to be on the lookout for your opponentHa, really?

Lookout definitions

noun

a person employed to keep watch for some anticipated event

See also: sentinel sentry watch spotter scout picket

noun

an elevated post affording a wide view

noun

a structure commanding a wide view of its surroundings

See also: observatory

noun

the act of looking out

See also: outlook