Infamous: Second Son day one patch, which is set to debut tomorrow alongside the actual game, will bring quite a few improvements but also a whopping 19 new side missions that tie into an ARG experience organized by developer Sucker Punch.

Infamous: Second Son makes its global debut tomorrow, March 21, for the PlayStation 4 platform, and developer Sucker Punch has already confirmed that it's going to debut a day-one update to fix issues spotted by the team after the game went gold and was sent to manufacturing.

According to Videogamer, this new patch, which weighs in at around 300MB, brings a variety of different improvements to the game's combat, difficulty, AI, or other such things.

More importantly, however, it also introduces a new series of missions called Paper Trail, which contains 19 different quests for players to explore.

The "innovative online and in-game story arc" sees Second Son owners explore the full story behind the occupation of Seattle by the DUP by completing the missions in game and by visiting different ARG websites online.

New content will be unlocked remotely in the next six weeks, so players have plenty of new adventures to look forward to besides the core story and side missions.

Besides these new things, the patch also enables the Cole's Legacy DLC, which is free for those who pre-order the game, while making key changes to boss fights, AI behavior, or the difficulty curve.

Check out the rest of the full changelog for Infamous: Second Son update 1.01 below.

Cole's Legacy Content Pack - Free with pre-order - Explore the events immediately following Infamous 2 - Work with an investigative reporter to understand the source of conduit powers - 4 story missions, approximately 1 hour of gameplay

Infamous Paper Trail Storyline

- Free bonus missions and exclusive web content - Innovative online and in-game story arc co-developed by Sucker Punch and 42 Entertainment - Manga and murder, follow the trail of origami doves to discover the full story behind the D.U.P.'s occupation of Seattle. - 19 story missions and corresponding web-based investigations, approximately 5 hours of unique gameplay.

Difficulty

Balance

- Normal difficulty has been slightly increased to challenge the player’s mastery of their powers - Expert difficulty has been fine-tuned to ensure it is the best experience for skilled gamers - Karma progression extended to support longer playtime

Boss

Fights

- The boss fights have been re-tuned for difficulty and fun - More dynamic boss behaviors and attacks

Pedestrians and DUPs

- Engine performance tweaks to allow for more life and activity in the city - Increased pedestrian and traffic density and variety - Increased pedestrian-related karmic opportunities - Post-story enemy activity and D.U.P. raids

Technical Improvements

- Graphics and performance improvements - Fixes for a small number of infrequent blocking bugs - PSN integration to support Paper Trail DLC

The new patch will go live via the PlayStation Network in the very near future, before Second Son is made available worldwide.