Soulcalibur: Lost Swords is a free-to-play fighting game distributed through the PlayStation Network. Released on 2014, the game is based on Soulcalibur V and is strictly single-player. It uses the same weapon-based fighting system from previous games; however, several of the gameplay mechanics are changed, simplified or otherwise removed. Similar to other free-to-play titles like Tekken Revolution, microtransactions are offered, some of which removes the playtime limit of the game. The game is also periodically updated with new content, including new events, items, and characters.
Source: Wikipedia, "Soulcalibur: Lost Swords", available under the CC-BY-SA License.