add new engines

[stamepicmorg]

https://store.steampowered.com/app/563560/Alien_Swarm_Reactive_Drop/

[stamepicmorg]

• https://store.steampowered.com/app/447820/Day_of_Infamy/
• https://store.steampowered.com/app/224260/No_More_Room_in_Hell/
• https://store.steampowered.com/app/17520/Synergy/
• https://store.steampowered.com/app/1117390/Snowdrop_Escape/
• https://store.steampowered.com/app/286080/Thinking_with_Time_Machine/
• https://store.steampowered.com/app/1828210/Requiem_Of_Science/
• https://store.steampowered.com/app/397680/FIREFIGHT_RELOADED/

[stamepicmorg]

7c2916a

[stamepicmorg]

https://steamdb.info/app/17550/info/
https://steamdb.info/depot/447822/
https://store.steampowered.com/curator/6858478-Source-Engine-Games/?appid=17550