This is the title on the resource itself--screen, menu, label, packaging. If these are different, pick one and record the others as variant titles using hasAlternativeTitle. If your system allows it, record the source from which you took the title.
Some systems may designate a part of the title string as a subtitle, however, game titles seldom have true subtitles, so the colon and string following the colon should be included as part of the title.
Some systems require the separation of a subtitle. However, best practice is to follow the convention on the resource and be selective about recording something as a subtitle when it is intended to be part of the title.
Examples:
Dublin Core (elements)
Camp Lazlo: Leaky Lake games.PES 2014 : pro evolution soccerPro evolution soccer 2014The con
MODS
Camp Lazlo: Leaky Lake games.PES 2014pro evolution soccerPro evolution soccer 2014Thecon
MARC/RDA
245 00 Camp Lazlo: Leaky Lake games.
500 Title from cartridge label.
245 00 PES 2014 : $b pro evolution soccer
246 1 $iTitle on container spine:$aPro evolution soccer 2014
500 Title from disc label.
245 04 The con.
500 Title from disc label.
Schema.org
Camp Lazlo: Leaky Lake games