"gotten off guard" would properly be "caught off guard" "sudden change of development" is a mix of two different phrases with similar meanings. It should be either "sudden change of pace" or "sudden development". Hope that is of some use to you.
And because of Shin's actions are being too fast, the opponents that are coming towards him are gotten off-guard at the sudden change of development.
Games · ProudMonkey
prevaricate - to lie procrastinate - to put off until later (never do today what you can put off until tomorrow) Aside from that, the story is quite entertaining.
The Titan prevaricated, unsure whether to open the messages or not. A few moments later, Ryan decided to face the music and opened the messages, starting with Little John's.
Frontier Online
Games · Zelthias