For fans of old SSI and Avalon Hill table top strategy games, Terra Invicta brings back fond memories. Also it brings back the concept of turn checklist. Early on, your just establishing your agents and territory. However, soon your agents are going have way too much to do. And once spaceflight is established (to moon, asteroids, and out regions) your going have way too much to do (hence checklists). After two months of playing, I have yet to complete the easy game (got roughly to middle game twice, be started over since my space fleet(s) kept getting wiped out after building them.). If playing roughly 20 hours a week, it probably will take a month of play to finish a campaign.