- Oct. 26, 2017: Naoki_M got Polyglot for the usage of PyPy 3 and GNU C++14 to solve problems in Codeforces Round #443 (Div. 2)
- Sept. 25, 2017: Naoki_M got Polyglot for the usage of PyPy 3 and GNU C++14 to solve problems in Codeforces Round #436 (Div. 2)
- Sept. 6, 2017: Naoki_M got Polyglot for the usage of PyPy 3 and GNU C++14 to solve problems in Codeforces Round #433 (Div. 2, based on Olympiad of Metropolises)
- Sept. 4, 2017: Naoki_M got Polyglot for the usage of PyPy 3 and GNU C++14 to solve problems in Codeforces Round #432 (Div. 2, based on IndiaHacks Final Round 2017)
- Aug. 24, 2017: Naoki_M got Polyglot for the usage of PyPy 3 and GNU C++14 to solve problems in AIM Tech Round 4 (Div. 2)
- Aug. 21, 2017: Naoki_M got Polyglot for the usage of PyPy 3 and GNU C++14 to solve problems in Educational Codeforces Round 27
- Aug. 18, 2017: Naoki_M got Polyglot for the usage of PyPy 3 and GNU C++14 to solve problems in Codeforces Round #429 (Div. 2)
- Aug. 12, 2017: Naoki_M got Polyglot for the usage of PyPy 3 and GNU C++14 to solve problems in Codeforces Round #428 (Div. 2)
- Aug. 3, 2017: Naoki_M got Parselmouth for solving 50 problems in Python
- July 31, 2017: Naoki_M got Polyglot for the usage of PyPy 3 and GNU C++14 to solve problems in Codeforces Round #427 (Div. 2)
- July 24, 2017: Naoki_M got Polyglot for the usage of PyPy 3 and GNU C++14 to solve problems in Codeforces Round #425 (Div. 2)
- July 16, 2017: Naoki_M got Polyglot for the usage of PyPy 3 and GNU C++14 to solve problems in Educational Codeforces Round 25
- June 25, 2017: Naoki_M got Polyglot for the usage of PyPy 3 and GNU C++14 to solve problems in Codeforces Round #420 (Div. 2)
- June 17, 2017: Naoki_M got Polyglot for the usage of PyPy 3 and GNU C++14 to solve problems in Codeforces Round #419 (Div. 2)
- June 7, 2017: Naoki_M got Polyglot for the usage of PyPy 3 and GNU C++14 to solve problems in Codeforces Round #418 (Div. 2)
- June 5, 2017: Naoki_M got Polyglot for the usage of PyPy 3 and GNU C++14 to solve problems in Educational Codeforces Round 22
- May 20, 2017: Naoki_M got Polyglot for the usage of PyPy 3 and GNU C++14 to solve problems in Codeforces Round #415 (Div. 2)
- May 11, 2017: Naoki_M got Polyglot for the usage of Haskell and GNU C++14 to solve problems in Playrix Codescapes Cup (Codeforces Round #413, rated, Div. 1 + Div. 2)
- May 4, 2017: Naoki_M got Polyglot for the usage of Haskell and PyPy 3 to solve problems in Codeforces Round #411 (Div. 2)
- April 21, 2017: Naoki_M got Polyglot for the usage of GNU C++14 and Python 3 to solve problems in Codeforces Round #410 (Div. 2)
- March 23, 2017: Naoki_M got Polyglot for the usage of Haskell and Python 3 to solve problems in Codeforces Round #406 (Div. 2)
- Feb. 24, 2017: Naoki_M got Variety is the spice of life for solving problems in 6 different languages
- Feb. 24, 2017: Naoki_M got Polyglot for the usage of GNU C++14 and Python 3 to solve problems in Codeforces Round #401 (Div. 2)
- Oct. 17, 2016: Naoki_M got Polyglot for the usage of GNU C++14 and Ruby to solve problems in Codeforces Round #377 (Div. 2)
- Oct. 3, 2016: Naoki_M got Polyglot for the usage of GNU C++14 and Ruby to solve problems in Codeforces Round #375 (Div. 2)
- Oct. 1, 2016: Naoki_M got Polyglot for the usage of GNU C++14 and Ruby to solve problems in Intel Code Challenge Elimination Round (Div.1 + Div.2, combined)
- Sept. 30, 2016: Naoki_M got Polyglot for the usage of GNU C++14 and Ruby to solve problems in Codeforces Round #374 (Div. 2)
- Sept. 23, 2016: Naoki_M got Polyglot for the usage of Haskell and GNU C++14 to solve problems in Codeforces Round #373 (Div. 2)
- Sept. 17, 2016: Naoki_M got Polyglot for the usage of Haskell and GNU C++14 to solve problems in Codeforces Round #372 (Div. 2)
- Sept. 13, 2016: Naoki_M got Polyglot for the usage of Haskell and GNU C++14 to solve problems in Codeforces Round #371 (Div. 2)
- Aug. 24, 2016: Naoki_M got Polyglot for the usage of Haskell and GNU C++11 to solve problems in AIM Tech Round 3 (Div. 2)
- Aug. 20, 2016: Naoki_M got Polyglot for the usage of Haskell and GNU C++11 to solve problems in Codeforces Round #368 (Div. 2)
- Aug. 11, 2016: Naoki_M got Polyglot for the usage of Haskell and GNU C++11 to solve problems in Codeforces Round #367 (Div. 2)
- Aug. 4, 2016: Naoki_M got Polyglot for the usage of Haskell and GNU C++11 to solve problems in Codeforces Round #365 (Div. 2)
- July 29, 2016: Naoki_M got Polyglot for the usage of Haskell and Ruby to solve problems in Educational Codeforces Round 15
- July 19, 2016: Naoki_M got Polyglot for the usage of GNU C++11 and Ruby to solve problems in Codeforces Round #363 (Div. 2)
- July 14, 2016: Naoki_M got Polyglot for the usage of Haskell and Ruby to solve problems in Codeforces Round #362 (Div. 2)
- June 29, 2016: Naoki_M got Polyglot for the usage of Haskell and Ruby to solve problems in Codeforces Round #360 (Div. 2)
- June 23, 2016: Naoki_M got Variety is the spice of life for solving problems in 5 different languages
- June 23, 2016: Naoki_M got Polyglot for the usage of Haskell and Ruby to solve problems in Codeforces Round #359 (Div. 2)
- Feb. 4, 2016: Naoki_M got Gem among stones for solving 50 problems in Ruby
- Oct. 25, 2015: Naoki_M got Polyglot for the usage of GNU C++11 and Ruby to solve problems in Codeforces Round #327 (Div. 2)
- Oct. 15, 2015: Naoki_M got Polyglot for the usage of GNU C++11 and Ruby to solve problems in Codeforces Round #326 (Div. 2)

Gem among stones , last achieved on Feb. 4, 2016

Lambda's best friend (20 / 50 completed)

Mainstream guy (45 / 50 completed)

Parselmouth , last achieved on Aug. 3, 2017

Polyglot 39 , last achieved on Oct. 26, 2017

Runs on billions of devices... Slowly

Variety is the spice of life 2 , last achieved on Feb. 24, 2017