Original: Products were shipped under the Maxis logo for several years, but in 2004, The Sims 2 bore only the Electronic Arts logo on the box cover (although Sims 2 displays the Maxis logo at game start, and on the reverse side of the box).
Simplified: Products were shipped under the Maxis logo for several years until 2004, when The Sims 2 had only the Electronic Arts logo on the box cover.