entity

"env" - environment additions

These are effects like blood, sparks, and bubbles.

"ammo" - ammo

Simply ammo to be picked up, each weapon has it's own ammo type. (eg. "ammo_rpgclip")

"func" - functions

These interact with players. They are things like doors, ladders, friction, and much much more. These are applied to brushes (shapes) to turn them into something more than just a polygon. (eg. "func_ladder")

"info" - information about another entity

These tell other entities what they can control, where they lead to, and who they belong to. (eg. "info_teleport_destination" tells where a teleporter will drop you off at.)

"item" - items to grab or use

These can be picked up and held or used by the player. They include guns, armor, and flags. (eg. "item_tfgoal" the flag or object needing to be captured in TFC maps)

"light" - lighting effects

lights to see by. You can control color, path, brightness, and angle. (eg. "light")

"monster" - creatures with AI

Not only are these enemies, but also roaches, police, and friends. (eg. "monster_headcrab")

"trigger" - triggers an event

These cause you and your enemies to fall, move, take injury, or do something against your will when you cross them. (eg. "trigger_push")

"weapon" - a weapon to grab

These are the weapons you can pick up. Ammo is useless untill you have something to put it into. (eg. "weapon_snark")

"xen" - entities of the planet xen

Many things you run into on xen only have their own type. It is an assortment of items. (eg. "xen_tree")

En"ti*ty (?), n.; pl. Entities (#). [LL. entitas, fr. L. ens, entis, thing, prop. p. pr. of esse to be: cf. F. entit'e. See Essence, Is.]

A real being, whether in thought (as an ideal conception) or in fact; being; essence; existence.

Self-subsisting entities, such as our own personality. Shairp.

Fortune is no real entity, . . . but a mere relative signification. Bentley.

© Webster 1913.