Most of these titles have very good gameplay, like the Cossacks/America Conquest games, Battle Realms, & Age of Wonders. Judging by recent comments, I am glad that people have finally realized that the Cossacks games have a lot of merit. When they were first published, Ameritrash reviewers gave them lowish reviews and claimed they were just inferior AoE clones.
Age of Wonders
Age of Wonders 2: The Wizard\'s Throne$4.99
Age of Wonders: Shadow Magic $4.99
Battle Realms + Winter of the Wolf $3.99
King of Dragon Pass $2.39
Overlord + Raising Hell
Cossacks Anthology
Nexus: The Jupiter Incident
Uplink: Hacker Elite $1.19
DEFCON $1.99
Darwinia
Multiwinia
Galactic Civilizations I: Ultimate Edition
Fragile Allegiance
American Conquest + Fight Back
Eador: Genesis
Zafehouse: Diaries
Heroes of Annihilated Empires
Love GoG!