From March 20th 2017 and beyond, Gameopedia Wiki ditches the previously-used percentage scoring system in favour of a limited decimal system.
In the past, we've always used a scoring system that went anywhere from 0% to 100%. However, we feel that we can no longer justify scoring a game at 83% against a score of 80%. Why 83 and not 85? This is something that has been considered for a while and is enforced under what we believe will be a cleaner, more justified scoring system. For this reason, all future reviews will adopt a decimal scoring system in stints of 0.5. For example, a game could score or an 8, an 8.5, a 9, 9.5, etc. A game can no longer score something more obscure such as an 8.3, or a 7.7. Scores will run from 0 to 10.