Ubi Soft founders, the Guillemot brothers, own 17.5 percent of its capital and 22.8 percent of its voting rights, while EA now controls 18.4 percent of the voting rights.
EA has declined to comment on the financial terms of the deal with Talpa, but industry sources said the investment was in the range of $85 million to $100 million.
With a market capitalization of $18 billion, sales of $2.9 billion and cash of $2.5 billion, EA can easily afford Ubi Soft, which has a market value of about 375 million euros ($500 million), analysts said.
Few expect EA to stop at a 20 percent stake.
"While EA's intentions are still unknown, we assume the company's goal is ultimately to acquire Ubi Soft, which we would view as a positive for EA," Harris Nesbitt analysts said in a research note.