There are multiple on each map, and when you first load in the game tells you which extractions you can escape from. You get out by reaching an extraction point. This is usually approximately forty-five minutes, give or take. You equip items, load into a raid on one of the various maps in the game, and have a set amount of time to get out. The aim of the game is to get more money, buy more containers which expand your stash size so that you can horde even more loot, and eventually escape from Tarkov (coming in a later update). Like most looter-shooters, you have a stash to store your loot, and a flea market to sell it. This is the faction your PMC will fight for.
Upon starting the game, the player selects either BEAR (a Russian-sponsored PMC group) or USEC (a Western one). Following a conflict in the area, its borders were sealed off, leaving scavengers and members of private military companies (PMCs) to duke it out.
A looter-shooter at heart, Escape from Tarkov is all about, well, escaping from Tarkov - a fictional region and city of Russia.