| CPC A63F 13/58 (2014.09) [A63F 13/795 (2014.09); A63F 13/822 (2014.09); G07F 17/3211 (2013.01); G07F 17/3213 (2013.01); G07F 17/3216 (2013.01); A63F 13/60 (2014.09); A63F 13/69 (2014.09); A63F 2300/6009 (2013.01); A63F 2300/609 (2013.01); A63F 2300/65 (2013.01); A63F 2300/807 (2013.01); G07F 17/34 (2013.01)] | 15 Claims |

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1. A computer for executing progress of a game by using a game content having a parameter value, the computer comprising:
a memory configured to store a plurality of game contents; and
circuitry configured to
count, for each of a first set of game contents, a number of a second set of game contents whose type matches that of the first set of game contents while displaying different game content from the first set of game contents although of a same type,
determine whether or not the parameter value of each of the first set of game contents is modifiable based on the counted number of the second set of game contents, wherein the counted number of the second set of game contents represents a number of times that the type of one of the first set of game contents matches the type of one of the second set of game contents, and
control a display to display in an identifiable manner a first game content of the first set of game contents in which the parameter value has changed based on a result of the determination,
wherein a first game content of the first set of game contents is interchangeable with a second game content of the second set of game contents.
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