While that's often the situation with game releases from Portal, the company has released a number of smaller designs over the years such as (the still somewhat involved) Witchcraft from Michał Oracz and Ignacy Trzewiczek and the abstract strategy game Glik from Adam Kałuża. While those games are ancient relics in today's on-the-run game industry, Portal is not finished with small designs, with the 18-card microgame Tides of Time from first-time designer Kristian Čurla scheduled to debut at Gen Con 2015 and reach retail outlets in August 2015. Here's an overview of the gameplay:
Tides of Time is a drafting game for two players. Each game consists of three rounds in which players draft cards from their hands to build their kingdom. Each card is one of five suits and also has a scoring objective. After all cards have been drafted for the round, players total their points based on the suits of cards they collected and the scoring objectives on each card, then they record their score. Each round, the players each select one card to leave in their kingdom as a "relic of the past" to help them in later rounds. After three rounds, the player with the most prosperous kingdom wins.
Tides of Time is for players aged 8 and up with a playing time of 10-20 minutes and a $12 MSRP.