The difference between Game and Line

Game as a noun (countable):

A playful or competitive activity. A playful activity that may be unstructured; an amusement or pastime. An activity described by a set of rules, especially for the purpose of entertainment, often competitive or having an explicit goal. A particular instance of playing a game; match. That which is gained, such as the stake in a game. The number of points necessary to win a game. In some games, a point awarded to the player whose cards add up to the largest sum. The equipment that enables such activity, particularly as packaged under a title. One's manner, style, or performance in playing a game. An amorous dalliance.

Game as a noun (countable):

A video game.

Game as a noun (countable, informal, nearly always singular):

A field of gainful activity, as an industry or profession.

Game as a noun (countable, figuratively):

Something that resembles a game with rules, despite not being designed.

Game as a noun (countable, military):

An exercise simulating warfare, whether computerized or involving human participants.

Game as a noun (uncountable):

Wild animals hunted for food.

Game as a noun (uncountable, informal, used mostly of males):

The ability to seduce someone, usually by strategy.

Game as a noun (uncountable, slang):

Mastery; the ability to excel at something.

Game as a noun (countable):

A questionable or unethical practice in pursuit of a goal; a scheme.

Game as an adjective (colloquial):

Willing to participate.

Game as an adjective (of an animal):

That shows a tendency to continue to fight against another animal, despite being wounded, often severely.

Game as an adjective:

Persistent, especially in senses similar to the above.

Game as an adjective:

Injured, lame (of a limb).

Game as a verb (intransitive):

To gamble.

Game as a verb (intransitive):

To play video games.

Game as a verb (transitive):

To exploit loopholes in a system or bureaucracy in a way which defeats or nullifies the spirit of the rules in effect, usually to obtain a result which otherwise would be unobtainable.

Game as a verb (transitive, slang, of males):

To perform premeditated seduction strategy.

Line as a noun (geometry):

A path through two or more points (compare ‘segment'); a continuous mark, including as made by a pen; any path, curved or straight. An infinitely extending one-dimensional figure that has no curvature; one that has length but not breadth or thickness. A line segment; a continuous finite segment of such a figure. An edge of a graph. A circle of latitude or of longitude, as represented on a map. The equator. One of the straight horizontal and parallel prolonged strokes on and between which the notes are placed. The horizontal path of a ball towards the batsman (see also length). The goal line.

Line as a noun:

A rope, cord, string, or thread, of any thickness.

Line as a noun:

A hose or pipe, of any size.

Line as a noun:

Direction, path.

Line as a noun:

The wire connecting one telegraphic station with another, a telephone or internet cable between two points: a telephone or network connection.

Line as a noun:

A clothesline.

Line as a noun:

A letter, a written form of communication.

Line as a noun:

A connected series of public conveyances, as a roadbed or railway track; and hence, an established arrangement for forwarding merchandise, etc.

Line as a noun (military):

A trench or rampart, or the non-physical demarcation of the extent of the territory occupied by specified forces.

Line as a noun:

The exterior limit of a figure or territory: a boundary, contour, or outline; a demarcation.

Line as a noun:

A long tape or ribbon marked with units for measuring; a tape measure.

Line as a noun (obsolete):

A measuring line or cord.

Line as a noun:

That which was measured by a line, such as a field or any piece of land set apart; hence, allotted place of abode.

Line as a noun:

A threadlike crease or wrinkle marking the face, hand, or body; hence, a characteristic mark.

Line as a noun:

Lineament; feature; figure (of one's body).

Line as a noun:

A more-or-less straight sequence of people, objects, etc., either arranged as a queue or column and often waiting to be processed or dealt with, or arranged abreast of one another in a row (and contrasted with a column), as in a military formation.

Line as a noun (military):

The regular infantry of an army, as distinguished from militia, guards, volunteer corps, cavalry, artillery etc.

Line as a noun:

A series or succession of ancestors or descendants of a given person; a family or race; compare lineage.

Line as a noun:

A small amount of text. Specifically: A written or printed row of letters, words, numbers or other text, especially a row of words extending across a page or column, or a blank in place of such text. A verse (in poetry). A sentence of dialogue, especially in a play, movie or the like. A lie or exaggeration, especially one told to gain another's approval or prevent losing it.

Line as a noun:

Course of conduct, thought, occupation, or policy; method of argument; department of industry, trade, or intellectual activity.

Line as a noun:

The official, stated position (or set of positions) of an individual or group, particularly a political or religious faction.

Line as a noun:

A set of products or services sold by a business, or by extension, the business itself.

Line as a noun (stock exchange):

A number of shares taken by a jobber.

Line as a noun (historical):

A measure of length: A tsarist-era Russian unit of measure, approximately equal to one tenth of an English inch, used especially when measuring the calibre of firearms. One twelfth of an inch. One fortieth of an inch.

Line as a noun (historical):

A maxwell, a unit of magnetic flux.

Line as a noun (baseball, slang, 1800s, with "the"):

The batter's box.

Line as a noun (fencing, ‘[[line of engagement]]’):

The position in which the fencers hold their swords.

Line as a noun (engineering):

Proper relative position or adjustment (of parts, not as to design or proportion, but with reference to smooth working).

Line as a noun:

A small portion or serving (of a powdery illegal drug).

Line as a noun (obsolete):

Instruction; doctrine.

Line as a noun (genetics):

Population of cells derived from a single cell and containing the same genetic makeup.

Line as a noun:

(perfusion line) a set composed of a spike, a drip chamber, a clamp, a Y-injection site, a three-way stopcock and a catheter.

Line as a noun (ice hockey):

A group of forwards that play together.

Line as a noun (medicine, colloquial):

A vascular catheter.

Line as a verb (transitive):

To place (objects) into a line (usually used with "up"); to form into a line; to align.

Line as a verb (transitive):

To place persons or things along the side of for security or defense; to strengthen by adding; to fortify.

Line as a verb:

To form a line along.

Line as a verb (transitive):

To mark with a line or lines, to cover with lines.

Line as a verb (transitive, obsolete):

To represent by lines; to delineate; to portray.

Line as a verb (transitive):

To read or repeat line by line.

Line as a verb (intransitive, ‘line up’):

To form or enter into a line.

Line as a verb (intransitive, baseball):

To hit a line drive; to hit a line drive which is caught for an out. Compare fly and ground.

Line as a verb:

To track (wild bees) to their nest by following their line of flight.

Line as a noun (obsolete):

Flax; linen, particularly the longer fiber of flax.

Line as a verb (transitive):

To cover the inner surface of (something), originally especially with linen.

Line as a verb:

To reinforce (the back of a book) with glue and glued scrap material such as fabric or paper.

Line as a verb (transitive):

To fill or supply (something), as a purse with money.

Line as a verb (transitive, now, rare, of a dog):

to copulate with, to impregnate.