Microsoft has cleared nearly all of the major obstacles in its path to securing the biggest acquisition in gaming history but, for gamers, the future remains unclear. The technology giant is nearly at the finish line of its protracted bid to take over Activision Blizzard, the hit video game developer, for $69bn (£52.9bn). But after 19 months of fevered back-and-forth with regulators, governments and competitors since it first announced plans to buy the developer, Microsoft now has to stop and wait while the UK's competition regulator reviews its amended offer. Earlier this week, a London tribunal formally paused Microsoft's appeal…