GOG's  Take On 2K sale sees 11 of the publisher's classics debut on the distribution platform. Running until April 5, the sale bundles games from the X-COM, Freedom Force and Railroad Tycoon series—and Sid Meier's Pirates—into groups as follows:

• Sid Meier's Railroads
• Railroad Tycoon II
• Railroad Tycoon III

X-COM Classic Bundle: 5.45/$7.45 (-75%, 50% off individually)

• X-COM: UFO Defense
• X-COM: Terror from the Deep
• X-COM: Apocalypse
• X-COM: Interceptor
• X-COM: Enforcer

Freedom Force Pack: 2.78/$3.98 (-66%, 50% off individually)

• Freedom Force
• Freedom Force vs. The Third Reich

Sid Meier's Pirates!: 3.49/$4.99 (-50%)

"Ruthless strategic warfare? Check. Weirdo superheroes? You bet. Hilarious dancing sequences? Naturally," reads a post on  GOG.com. "And once again, the satisfaction of checking off a couple dozen thousand of your wishlist votes for some seriously good old games. So join us on the choo-choo train through battlefields riddled with alien corpses and swashbuckling superheroes—because we're taking on 2K!"

If that tickles your fancy, you've got until 2pm BST/6am PDT/9 AM EDT to grab the discounts before the Take On 2K sale expires.