The game combines tower defense strategy with a rolling ball mechanic similar to games such as Marble Madness and Super Monkey Ball. The aim of the game is to use a large stone boulder to attack the enemy's castle at the bottom of the hill, while using various defensive structures to defend your own. Players can use a variety of obstacles to defend the path leading up to the castle, such as buildings, dynamite, windmills and animals. Players can also plant money farms in order to raise the funds needed to use certain objects. The player can only add obstacles on green colored landscapes, which turn unusable when obstacles or money farms are planted on top of them. When ready to attack, the player can take control of a boulder and roll itdown the hill, avoiding obstacles in order to attack the enemy castle's gate. If the player has enough points, he can equip the boulder with power-ups, such as armor or magma, which enhance the boulder's defensive or offensive capabilities, though they will lose this power up if the boulder takes sufficient damage. Once the boulder hits the gate, or their boulder breaks after taking too much damage, there is a small recharge period before another boulder can be launched. The player wins if he can break through the castle gates and place his boulder in the center of the castle, killing the opponent. The game includes a story mode, which is loosely based on the myth of Sisyphus and features various stages, boss levels, and several multiplayer modes. "War" features two players attempting to break each other's castle gates, whilst "Skee Boulder" requires players to race down a lane hitting targets before landing in a skeeball-style board while attempting to land their boulder in the target with the largest score multiplier. Rock of Ages features a chronology which spans across five time periods: Ancient Greek, Medieval, Renaissance, Rococo and Romanticism. Each time period features a unique, Pythonesque art style during gameplay. The team narrowed their selection to these five periods from a larger pool of 16 time periods which included Neoclassic, Prehistoric, and Impressionism.
''Pebble of Time''
As a prank for April Fool's Day 2011, ACE Team created a page for a fake independent developer in which the developer claimed in broken English that he had been working on an indie title called Pebble of Time for the past eight years, and that ACE Team had stolen his concept. The developer claimed he was releasing his title for free to undercut support for Rock of Ages, and provided download links for his working prototype. Edmundo Bordeu later updated the site to reflect that it was indeed an April Fool's joke.
Reception
Rock of Ages received favorable to mixed reviews upon its release. It holds an average of 72/100 for the Xbox 360 version, 74/100 for the PC version and 68/100 for the PlayStation 3 version on Metacritic. Inside Gaming Awards gave the game its 2011 Most Original Game award.
Sequels
A sequel, titled , which introduces a new four-player multiplayer mode, was released for Microsoft Windows, PlayStation 4 and Xbox One in August 2017, and on Nintendo Switch in May 2019. Rock of Ages III: Make & Break was announced to be released July 21, 2020 on Microsoft Windows, Nintendo Switch, PlayStation 4, Xbox One, and Stadia.
