Valve announced yesterday that retailers and Steam are now accepting preorder reservations for Portal 2. Special pre-order offers for those who reserve the game include a X amount of dollars off and/or exclusive in-game content before the game’s release on April 18. For example, $5 off the game’s purchase and exclusive in-game skins for the two coop bots (Atlas and P-Body). In celebration of Valentine’s Day, Valve released a trailer that’s pretty charming…
