Why don't the XCOM soldiers say their voice quips as they run to their new positions?

I just got my son XCOM: Enemy Unknown and Enemy Within on Steam. He immediately downloaded and tried them both. The game is working well on two different machines but in neither case do the soldiers say their quips (e.g., "Running", "Moving at the speed of death!") when he controls them.

EDIT: Just to clarify, the "enable soldiers speech" and "native language" option are both selected.

Points of interest:

Both machines are slightly older hardware (about 4-5 years old) but neither has trouble actually running the game.
He's already tried verifying the installed files.
We're seeing identical behavior on both machines.
All other audio seems to work fine (including the cut-scenes).
EDIT some time later: He's also tried playing with the Xbox controllers instead of mouse and keyboard.

Is there a set of files that I could check manually? I have a clean install on this machine (which definitely plays the quips on move).

xcom-enemy-unknown xcom-enemy-within

Best Answer

Sorry if you've tried this already, just need to make sure it's not one of these first:

in the options, under "gameplay", make sure soldier speech is enabled.

Under Audio: make sure the voice volume is turned up

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Does XCOM have an ending?

There are only two possible outcomes to the game, winning, by killing the "priests" at the temple ship, or losing, where 8 nations have left the XCOM project. There is another condition, where the volunteer (the soldier used in the gallop chamber) must survive the final battle (temple ship).

What does Will do in XCOM Enemy Unknown?

Will is combination of 3 stats from classic game: Morale , Psionic Strength and Psionic Skill. Advantages of higher Will stats: less chance of panicking. higher chance to be psi gifted.

What engine is XCOM made in?

The game is powered by Unreal Engine 3.5.

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