Greetings. I’m a patient gamer and a dedicated steam achievement hunter.
Please read below before friend request:

All friend invites meeting all three points below will be accepted:
1. No VAC ban or SAM usage -- outright cheating is not acceptable, exploits of bugs or game mechanics are not recommended but still tolerable;
2. Open profile -- should be completely visible to friends;
3. Avg. Game Completion >= 50% -- For most of the games completing the main story should give more than 50%, and there are plenty of easy to 100% games.

If you are blocked, most likely is because I believe you have been using SAM. I may be wrong, but I have my reasons.

After all, happy gaming and have fun ~ thanks for reading