Okay. Note that when I list the "worst," I don't necessarily mean "bad," just that it's the weakest in its series by a significant margin.
-Advance Wars: Advance Wars (as in, the original)
-Battlefield: Battlefield: Modern Combat (the console version of BF2 in case you're wondering)
-Command & Conquer: Tiberian Twilight (nah, really?)
-Doom: Doom II (every Doom game I've played has brought something to the table bar Doom 2, which is little more than an expansion to the original)
-Gears of War: Judgement (not bad by any means, but easily my least favourite installment)
-Halo: ODST (for a lot of reasons)
-The Legend of Zelda: Link's Awakening (haven't played every LoZ game, but this is my least favourite, and frankly, I find its popularity baffling)
-Metal Gear: Metal Gear (as in, the very first game)
-Metroid Prime: Hunters (I'm sorry, but there's no way this is worse than Other M, in case you're wondering. Other M didn't cause me physical pain to play at least)
-Resident Evil: Umbrella Corps (I'd list Beginning Hour, but that's a demo rather than a game, so Umbrella Corps it is)
-Sonic the Hedgehog: Shadow the Hedgehog (in case you're wondering, SegaSonic Cosmo Fighter is technically worse (yes, I played it), and I haven't played enough of Sonic 06 to really rank it, so Edgy the Hedgy gets last place)
-Star Fox 2 (they somehow made a game worse than Star Fox Command)
-Warcraft: Orcs and Humans (this is arguably cheating, but like Doom II, this is the one game in the Warcraft franchise that really has nothing left to offer - WC2/3 give different RTS experiences, WoW's an MMO, Hearthstone's a CCG, but there's no real reason to go back to this game)
-Advance Wars: Advance Wars (as in, the original)
-Battlefield: Battlefield: Modern Combat (the console version of BF2 in case you're wondering)
-Command & Conquer: Tiberian Twilight (nah, really?)
-Doom: Doom II (every Doom game I've played has brought something to the table bar Doom 2, which is little more than an expansion to the original)
-Gears of War: Judgement (not bad by any means, but easily my least favourite installment)
-Halo: ODST (for a lot of reasons)
-The Legend of Zelda: Link's Awakening (haven't played every LoZ game, but this is my least favourite, and frankly, I find its popularity baffling)
-Metal Gear: Metal Gear (as in, the very first game)
-Metroid Prime: Hunters (I'm sorry, but there's no way this is worse than Other M, in case you're wondering. Other M didn't cause me physical pain to play at least)
-Resident Evil: Umbrella Corps (I'd list Beginning Hour, but that's a demo rather than a game, so Umbrella Corps it is)
-Sonic the Hedgehog: Shadow the Hedgehog (in case you're wondering, SegaSonic Cosmo Fighter is technically worse (yes, I played it), and I haven't played enough of Sonic 06 to really rank it, so Edgy the Hedgy gets last place)
-Star Fox 2 (they somehow made a game worse than Star Fox Command)
-Warcraft: Orcs and Humans (this is arguably cheating, but like Doom II, this is the one game in the Warcraft franchise that really has nothing left to offer - WC2/3 give different RTS experiences, WoW's an MMO, Hearthstone's a CCG, but there's no real reason to go back to this game)