The first thing I have to say is that Rotten Tomatoes' percent scores tend to be more extreme than the (mathematical) mean review scores because they just weigh positive versus negative, so two stars out of five would be a big fat zero on that scale. It applies across the board but is probably most pronounced on low to medium scoring films.
OK, so this called for a little more research. I decided to pick a few game films that I knew enough about and see how they fared against what I would consider roughly equivalent films from the same year.
Starting with Dead or Alive, because I've actually seen it. It's daft fun. Not sure I'd want to sit through it twice but I quite enjoyed it. It's from 2006 and scored 34%.
Other films from that year include, The Da Vinci Code (25% despite an average of 4.8/10), Superman Returns (76%), Scary Movie 4 (37%), Mission Impossible III (70%) and Saw III (25%).
Final Fantasy: The Spirits Within was the highest rated on wiki's list at 43%.
2001 also brought us such joys as The Mummy Returns (47%), Pearl Harbour (25%), Planet of the Apes (45%), Cats & Dogs (54%), Atlantis - The Lost Empire (49%), Thirteen Ghosts (12%) and A Knight's Tale (58%).
In 1994, the likes of JCVD, Kylie and even Simon Callow couldn't save the stinker that was Street Fighter from a miserble 12%
It went up against: True Lies (72%), The Santa Clause(80% wait, what?), The Flintstones (22%), The Naked Gun 33 1/3: the Final Insult (53%), D2: The Mighty Ducks (15%) and, as you say, Timecop (44%).
Last one. Prince of Persia: The Sands of Time (35%).
2010. Alice in Wonderland (51%), The Karate Kid (67%), Tron Legacy (50%), Clash of the Titans (28%), Little Fockers (10%), Robin Hood (43%) and The Expendables (41%).
It's clearly a matter of opinion as to how those various movies should rank but I don't see the critical bias there. They're as likely to give a panning to The Flinstones, Clash of the Titans and Thiteen Ghosts as they are to Hitman and Resident Evil.