CastleStorm

• Title — CastleStorm • Developer — Zen Studios • Publisher — Zen Studios • Composer — Waterflame • Genre — Tower defense • Modes — Single-player, multiplayer

CastleStorm is a side-scrolling physics-based real-time strategy game with tower defense elements. The player plays a number of characters obtained from completing separate game "campaigns", starting with the default character, Sir Gareth who is introduced in the first campaign, Kingdom Quest. There are four separate campaigns featured in the game, all set in slightly different points of time, with the last being, "The Warrior Queen".

Sir Gareth, protector of the realm is fighting Vikings. The knights and vikings have had a longstanding peace, but it breaks when ancient crystal is stolen. It falls to Sir Gareth to rally the troops, retrieve the gem, and restore peace to the land.

CastleStorm was initially released for Xbox 360 via Xbox Live Arcade (XBLA) on May 29, 2013 through publisher Microsoft Game Studios. It was released as a self-published title for all subsequent releases, first being made available for Windows via Steam two months later on July 29. Ports for PlayStation 3 and PlayStation Vita were released on November 5, 2013 in North America and on November 6 in Europe, with a Wii U version following one month later on December 26. A remastered version of the title including both pieces of downloadable content was released for PlayStation 4 and Xbox One as CastleStorm: Definitive Edition on September 23 in North America and September 24 in Europe. A port for Nintendo Switch was made available on August 16, 2018.

CastleStorm received two pieces of downloadable content (DLC) entitled CastleStorm: From Outcast to Savior, and CastleStorm: The Warrior Queen. The first expansion was released for XBLA and Steam on July 31, 2013. The second expansion was made available the same year for Steam on September 25, and for XBLA on September 27. Both were released simultaneously for PlayStation 3 and Vita on November 26, 2013. From Outcast to Savior and The Warrior Queen were released for Wii U in 2014 on February 26 and March 13, respectively.

A mobile adaptation was released for Android, iOS, and Kindle devices on May 8, 2014, as CastleStorm - Free to Siege. A virtual reality adaptation of the title titled CastleStorm VR was released for Oculus Rift and Samsung Gear VR devices on July 7, 2016, and for PlayStation VR on August 1, 2017.

As the developer of the Zen Pinball series, Zen Studios also developed its own virtual pinball adaptation of CastleStorm and released it as part of the Iron and Steel pack for Zen Pinball 2, Pinball FX 2 and Pinball FX 3 in early 2015; with a remastered version released as a single table for Pinball FX on March 31, 2022. This table omits blood from the game due to censorship reasons and features 3-D animated figures of Sir Gareth and various Viking enemies, and is played entirely from Sir Gareth's perspective, with modes focusing on attack or defense against the Vikings, as well as celebrations in between battles.