Tencent has increased its stake in French games maker Ubisoft, the company behind popular franchises like Assassin’s Creed. But analysts said this has effectively closed the door on a full takeover of the company. Rafael Henrique | Sopa Images | Lightrocket | Getty Images Shares of games developer Ubisoft plunged more than 17% on Wednesday after prospects of a full takeover were dampened following a move by Chinese tech giant Tencent to increase its stake in the company. On Tuesday, the two companies announced that Tencent invested 300...