The Hit is a multiplayer stealth-shooter, set in an open-world city with tens of thousands of NPCs. Track down your target and kill them as quickly and cleanly as possible, before the other players can manage it. Try to stay incognito, or photograph other players and take out hits on them.
10,000 NPCs in-game makes my PC struggle a little, but I'm not planning on using quite that many NPCs at one time in The Hit. Probably two to four thousand tops.